Accuracy of Kardia Mobile?? Frustrated!

Re: Accuracy of Kardia Mobile?? Frustrated!

TomR — Sun, 03 Nov 2024 06:08:27 +0000

Quote
Myticker
My goodness, so much resemblance to my case. Below 50 HR, Drs saying low HR is good because I play competitive tennis, Afib episodes with HR still low,
an ablation many years after 1st diagnosis of AFib.. Wow. I’ve even had Drs saying low HR is saving beats for later in life when I need it. However, as I’m older I no longer exercise nearly as much as when I was even in my 40s and still have resting HR low 50s and in 40s. Scary to think what it must be when sleeping.
The Kardia readings of Brady, Unclassified, Possible Afib, and Nornal Sinus Rhythm are still a bit questionable to me. I wonder if Atrial Flutter may be throwing a hiccup in Kardia’s software? Have you ever been told you have Flutter? I bring this up because a PA once told me he saw a slight signs of Flutter in one of my Kardia Nornal readings.

I wish someone from Alivcore was monitoring this thread and would chim in.

Seeing a new Electrophysiologist today. Hope to have these questions answered ..

….to be continued

Hi Myticker - nice to meet someone with a similar afib profile ! Yes, in 2019 flutter was mentioned on my holter report or ecg, I can't remember which. I think it is more challenging to treat both afib and flutter.

I am new to everything here and very much in a learning mode.

Re: Accuracy of Kardia Mobile?? Frustrated!

TomR — Sun, 03 Nov 2024 05:56:15 +0000

Quote
GeorgeN
Chronic endurance exercise was my path to afib 20 years ago & my first four months of my afib career had a 2.5 month episode of persistent afib (terminated with a loading dose of the med flecainide). Exercise was a vagal or parasympathetic afib trigger for me. This means the afib didn't happen during exercise, but after, when resting or in the night while sleeping. I empirically learned I could do long duration activity without it being a trigger as long as I limited my exertion to what I could do using nasal breathing. Later, I learned the cycling community calls this "Zone 2." From a metabolic perspective you are using aerobic metabolism for almost all of your energy generation. I believe higher exertion, which utilizes more anaerobic (without oxygen) metabolism has much more oxidative stress. I also found that empirically, I could do short term high & even max effort activity without issue. Using these observations as guidelines, I've found ways to maintain excellent fitness at age 69 with a minimal afib burden (commonly below 0.05% in most years). My average heart rate last night during sleep was 45 and the low was 37.

A 3 year old thread on the exercise topic is a good read: [www.afibbers.org]

GeorgeN, I really appreciate your experience on exercise. I tried the nose only breathing tonight. I don't have the long baseline you have but am hopeful it will help me do more. In August I stopped doing 2 hrs moderate exercise (3-5 days weekly) after being let out of hospital. Am now slowing building it up. My spouse doesn't like me doing pushups but hopefully I can safely add that to 30 minutes of yoga and other stretches. My Kardia today reported NSR for the first time in ages. But if I go walking 3 miles my BP goes to around 110-135 BPM -- it comes down, sometimes in 20 minutes, sometimes in a couple of hours. My target, perhaps naive, is to get off the BBs and anti-coagulants...

I spent a bit of time on the links you sent. I need more time to review it. I noted that you have useful monitoring devices and a good "picture" of your afib.

Thanks again.

Re: Accuracy of Kardia Mobile?? Frustrated!

TomR — Sun, 03 Nov 2024 05:43:20 +0000

Quote
Carey
What you see in that recording is a PVC. Again, afib isn't an odd beat here and there. It's a continuous arrhythmia. Flutter is the same. That recording does not show afib or flutter.

Thank you Carey for commenting. I value your views and if I do find an afib recording with < 50 BPM I will indeed post it.

Thanks also Pompon.

Re: Accuracy of Kardia Mobile?? Frustrated!

GeorgeN — Sat, 02 Nov 2024 16:51:18 +0000

Quote
Myticker
I’ve even had Drs saying low HR is saving beats for later in life when I need it. However, as I’m older I no longer exercise nearly as much as when I was even in my 40s and still have resting HR low 50s and in 40s. Scary to think what it must be when sleeping.

Chronic endurance exercise was my path to afib 20 years ago & my first four months of my afib career had a 2.5 month episode of persistent afib (terminated with a loading dose of the med flecainide). Exercise was a vagal or parasympathetic afib trigger for me. This means the afib didn't happen during exercise, but after, when resting or in the night while sleeping. I empirically learned I could do long duration activity without it being a trigger as long as I limited my exertion to what I could do using nasal breathing. Later, I learned the cycling community calls this "Zone 2." From a metabolic perspective you are using aerobic metabolism for almost all of your energy generation. I believe higher exertion, which utilizes more anaerobic (without oxygen) metabolism has much more oxidative stress. I also found that empirically, I could do short term high & even max effort activity without issue. Using these observations as guidelines, I've found ways to maintain excellent fitness at age 69 with a minimal afib burden (commonly below 0.05% in most years). My average heart rate last night during sleep was 45 and the low was 37.

A 3 year old thread on the exercise topic is a good read: [www.afibbers.org]

Re: Accuracy of Kardia Mobile?? Frustrated!

Carey — Sat, 02 Nov 2024 15:48:45 +0000

What you see in that recording is a PVC. Again, afib isn't an odd beat here and there. It's a continuous arrhythmia. Flutter is the same. That recording does not show afib or flutter.

Re: Accuracy of Kardia Mobile?? Frustrated!

Myticker — Sat, 02 Nov 2024 13:28:16 +0000

My goodness, so much resemblance to my case. Below 50 HR, Drs saying low HR is good because I play competitive tennis, Afib episodes with HR still low,
an ablation many years after 1st diagnosis of AFib.. Wow. I’ve even had Drs saying low HR is saving beats for later in life when I need it. However, as I’m older I no longer exercise nearly as much as when I was even in my 40s and still have resting HR low 50s and in 40s. Scary to think what it must be when sleeping.
The Kardia readings of Brady, Unclassified, Possible Afib, and Nornal Sinus Rhythm are still a bit questionable to me. I wonder if Atrial Flutter may be throwing a hiccup in Kardia’s software? Have you ever been told you have Flutter? I bring this up because a PA once told me he saw a slight signs of Flutter in one of my Kardia Nornal readings.

I wish someone from Alivcore was monitoring this thread and would chim in.

Seeing a new Electrophysiologist today. Hope to have these questions answered ..

….to be continued

Re: Accuracy of Kardia Mobile?? Frustrated!

GeorgeN — Sat, 02 Nov 2024 13:10:55 +0000

I completely agree with Pompon. The p waves are very distinct.

Re: Accuracy of Kardia Mobile?? Frustrated!

Pompon — Sat, 02 Nov 2024 07:39:41 +0000

Does not look like AFib, IMO.
There are p waves, artifacts and maybe PACs ?

Re: Accuracy of Kardia Mobile?? Frustrated!

TomR — Sat, 02 Nov 2024 07:19:17 +0000

Quote
Carey
Do you know for a fact that you've ever been in afib with a HR below 50? Afib is a tachy-arrhythmia so bradycardia + afib would be quite unusual. I've never seen it before. It also seems unlikely that the designers would prioritize reporting something as obvious as bradycardia instead of afib, which is the device's primary purpose.

Hi Carey

In my case, I've had a low pulse in the 40's for about 40 years. Many doctors over the years used to comment that I must be very athletic but I was not. My afib was first diagnosed in 2012. But I only had my first afib "event" over 2 months ago when my pulse went up to 150 BPM and it took 2 days to get it down by medical cardioversion. I am now taking 17mg metropolol daily. Even when in afib, my resting pulse is usually below 50 though sometimes Kardia says I am bradycardia and sometimes it says possible afib. But for the bradycardia readings, when I look at the tracing, I am in afib.

I have no symptoms when in afib other than during the event just over 2 months ago when I felt my heart racing.

Attached is a bradycardia reading which I think shows I'm in AFIB. Do you agree?

Re: Accuracy of Kardia Mobile?? Frustrated!

Myticker — Fri, 01 Nov 2024 17:16:03 +0000

A big thank you to both of you!! You’ve restored my confidence in Kardia now knowing those close peaks is not z Afib.
I still need clarification why I got 3 different results of my Persistent Afib within 6 mins. But I’ll save it for my cardiologist as this thread is going longer than intended.

I also now know that if I can’t tap my foot to Atrial Fibrillation beats, I probably won’t be able to dance. 😊😊😊

Thanks again!!! 👍👍

Re: Accuracy of Kardia Mobile?? Frustrated!

GeorgeN — Fri, 01 Nov 2024 15:58:29 +0000

To illustrate Carey's point, here is an extreme example of NSR. Years ago, Mark, an optometrist from the UK sent me a PDF with a whole bunch of images of his unfortunate rhythms. NOTE, these are NOT ecg's, they are heart rate vs time graphs. EP's sometimes make them from Holter monitor data by plotting the time between R peaks in an ECG. This time can be converted to beats per minute and you get the same shape of the graph. This example (p32 of the PDF) is of Mark in NSR with many PAC's. The PAC beats, which are fast, are all followed by a slow compensatory beat. There are also some regular nsr beats. The second image (p14 of the PDF) is a zoom of what afib looks like.

Re: Accuracy of Kardia Mobile?? Frustrated!

Carey — Fri, 01 Nov 2024 14:41:27 +0000

Neither of those recordings shows afib. What you marked are PACs, which are pretty common for anyone who's had afib. You'll often hear them referred to as ectopic beats (ectopic means "out of place"). Afib isn't a single beat here and there. It's a continuous, completely irregular heartbeat. By irregular I mean it would be impossible to tap your foot to the rhythm and match what your heart is doing. But you could tap your foot to the rhythm shown in those recordings and be in time with your heart with every beat except those few beats you marked. Find a recording Kardia labels as afib and you should see the difference.

Re: Accuracy of Kardia Mobile?? Frustrated!

Myticker — Fri, 01 Nov 2024 14:21:34 +0000

... unless you just like the dancing. (:P)(:P)

The message from Unclassified results is "Atrial Fibrillation was not detected and your EKG does not fall under the algorithmic classification of Normal, Bradycardia, or Tachycardia. This may be caused by other arrhythmia, usually fast or slow heart rates, or poor-quality recordings.".
(And I do sit still with moistened fingertips while recording)

Attached are 2 of 3 recordings. One is Unclassified, the other Normal. The third was Possible Atrial Fib (not attached). I'm not an expert EKG reader but on both, the brackets I've marked appear to me to be irregular, indicating A-Fib. The third recording resulted in Possible A-fib. Note that all three were recorded with in 6 minutes of each other. This to me shows Kardia is not reliable. What am I missing?

Re: Accuracy of Kardia Mobile?? Frustrated!

Carey — Fri, 01 Nov 2024 02:40:35 +0000

MyTicker,

I think it's safe to assume that if the Kardia sees afib, it will tell you no matter what your heart rate, and if it doesn't then you're not in afib. I know you'd like it to say normal sinus rhythm but it can't say that because bradycardia isn't normal. I think you can relax and skip the dancing... unless you just like the dancing. ;)

Re: Accuracy of Kardia Mobile?? Frustrated!

GeorgeN — Fri, 01 Nov 2024 00:22:38 +0000

Quote
Myticker
I guess I’ll have to assume that when I see Brady I won’t be in Afib. Wish it would say Normal Sinus Rythm and Brady detected. But as I say, I’d like to see the confirming that without having to do a dance.

Quote
Carey
It also seems unlikely that the designers would prioritize reporting something as obvious as bradycardia instead of afib, which is the device's primary purpose.

I agree with Carey and I'd be willing to be a lot that if it saw afib with a rate below 50, it would report it as "possible afib" (or afib to a subscriber).

Re: Accuracy of Kardia Mobile?? Frustrated!

Myticker — Thu, 31 Oct 2024 23:21:02 +0000

Lots of info there; way over my head.
I’m definitely not a high intensity young athlete but what about one who is? If he has a low heart rate does he have an arrhythmia? And if he has a low heart rate with Afib is Kardia Mobile a device he can use?

Re: Accuracy of Kardia Mobile?? Frustrated!

Myticker — Thu, 31 Oct 2024 21:49:24 +0000

Beyond a shadow of a doubt. After 20 cardiofversions in past 25 years, yes I have gone in Afib. Im asymptomatic so I check every morning. The Kardia message says in effect
Afib not detected but the Brady shows positive. What I want to see is the “Normal Sinus Rhythm” confirmation. When I move around and get bpm above 50 it will show that. When I go Afib my bpm goes up to 70-80. I’m fortunate that my Afib bpm doesn’t t go very high. When I’m in Afib it will show “Possible Afib” and that’s when I let Dr know so he orders an EKG.
I guess I’ll have to assume that when I see Brady I won’t be in Afib. Wish it would say Normal Sinus Rythm and Brady detected. But as I say, I’d like to see the confirming that without having to do a dance.

Re: Accuracy of Kardia Mobile?? Frustrated!

GeorgeN — Thu, 31 Oct 2024 21:35:42 +0000

Quote
Myticker
It might say Bradycardia and Afib not detected. But I’ve never seen Brady and Possible Afib together.
I’m more interested in tbe Afib part

The Kardia only reports one result in my 12 years of experience. For example if it detects afib with a rate over 100, it reports afib, not tachy plus afib. Since Kardia uses R-R variability to diagnose afib, you can do this visually on the ECG. You can either just look at it or do a plot of the R-R times in ms or just from counting boxes between R peaks.

Here is what Chat GPT4 has to say on the topic:

Atrial fibrillation (AF) and bradycardia are two distinct cardiac arrhythmias, but they can often co-exist, particularly in patients with underlying conduction system disease, structural heart disease, or as a consequence of certain medications. Bradycardia in the context of atrial fibrillation, often termed **"bradycardia-tachycardia syndrome"** or "tachy-brady syndrome," is especially common in older adults and those with **sick sinus syndrome (SSS)**. This combination of AF and bradycardia presents unique challenges for diagnosis and management.

Here’s an overview of how AF and bradycardia are related, including mechanisms, clinical presentations, and management approaches, supported by references:

### 1. **Mechanisms of Atrial Fibrillation in Bradycardia**:
- **Sick Sinus Syndrome (SSS)**: Bradycardia and AF are commonly seen together in patients with SSS, a condition characterized by impaired function of the sinoatrial (SA) node. In SSS, periods of bradycardia are often followed by episodes of tachyarrhythmias like AF due to the instability of the sinus node.
- **Atrial Remodeling and Conduction Abnormalities**: Bradycardia promotes **atrial remodeling**, which may alter the electrical properties of the atrium and contribute to AF development. Prolonged bradycardia can lead to increased atrial stretch, fibrosis, and inflammation, creating a substrate that favors AF.
- **Research Findings**: A study found that patients with SSS often develop AF due to atrial remodeling and fibrosis secondary to prolonged bradycardia (*Circulation*, 2011).

### 2. **Clinical Presentation and Symptoms**:
- **Symptoms**: Patients with both AF and bradycardia may experience symptoms ranging from palpitations and fatigue to dizziness and syncope, depending on whether AF or bradycardia is predominant at a given time. Bradycardia can lead to reduced cardiac output, which may exacerbate the symptoms of AF.
- **Tachy-Brady Syndrome**: This syndrome is a subtype of SSS where patients alternate between fast (AF) and slow (bradycardia) heart rhythms. The irregular nature of AF combined with episodes of slow heart rate can lead to significant symptoms, especially if pauses occur when the heart switches between arrhythmias.
- **Supporting Evidence**: Research has shown that patients with tachy-brady syndrome report a higher burden of symptoms, as the alternating patterns of AF and bradycardia can cause hemodynamic instability and poor quality of life (*Journal of the American College of Cardiology*, 2012).

### 3. **Pathophysiology of Bradycardia-AF Interaction**:
- **Parasympathetic Activation**: Bradycardia can often be associated with increased vagal tone, which may trigger AF, particularly in vagally-mediated AF. This form of AF often occurs at night or during relaxation when parasympathetic activity is high.
- **Electrical Remodeling**: Long-standing bradycardia can alter the electrophysiological properties of atrial cells, promoting **early afterdepolarizations** and reentrant circuits, which are known mechanisms for triggering and maintaining AF.
- **Evidence in Animal Models**: Studies in animal models have demonstrated that bradycardia-induced atrial remodeling promotes a substrate conducive to AF by altering ion channel function and increasing atrial fibrosis (*Heart Rhythm*, 2015).

### 4. **Management of Atrial Fibrillation in the Context of Bradycardia**:
- **Pacemaker Implantation**: In patients with symptomatic bradycardia and AF, especially in tachy-brady syndrome, pacemaker implantation is often indicated. The pacemaker helps prevent symptomatic bradycardia and allows for safe use of rate-controlling medications for AF.
- **Rate Control vs. Rhythm Control**: In patients with both bradycardia and AF, a rate-control strategy may be prioritized, especially after pacemaker implantation. Medications like beta-blockers, calcium channel blockers, or digoxin can help control the ventricular rate in AF while the pacemaker prevents bradycardia.
- **Research Evidence**: Studies have shown that pacemaker implantation in tachy-brady syndrome patients improves symptoms and reduces the need for emergency interventions related to bradycardia and AF (*Journal of Cardiology*, 2016).

### 5. **Anticoagulation Considerations**:
- **Stroke Risk in AF**: Regardless of the presence of bradycardia, patients with AF are at increased risk of thromboembolic events. Therefore, anticoagulation therapy, often with direct oral anticoagulants (DOACs), is generally recommended based on risk factors (e.g., CHA₂DS₂-VASc score).
- **Bleeding Risk Management**: Since bradycardia can sometimes increase fall risk, bleeding risk assessments are essential to balance anticoagulation benefits and risks, especially in elderly patients.
- **Clinical Recommendations**: A study suggested that anticoagulation in patients with tachy-brady syndrome effectively reduces stroke risk without significantly increasing bleeding when monitored appropriately (*European Heart Journal*, 2018).

### 6. **Impact of Medications on Bradycardia-AF Relationship**:
- **Medications for Rate Control**: Medications used to control AF, such as beta-blockers or calcium channel blockers, can exacerbate bradycardia, particularly in patients with SSS. These medications may slow the heart rate excessively, leading to pauses and symptoms.
- **Avoiding Bradycardic Medications**: Patients with tachy-brady syndrome and no pacemaker may need alternative treatments, such as lower doses or non-bradycardic medications. In such cases, careful monitoring is required to prevent exacerbation of bradycardia.
- **Supporting Evidence**: Studies highlight the importance of dose adjustments in rate-control therapy to prevent symptomatic bradycardia, particularly in elderly patients with AF and concomitant SSS (*American Heart Journal*, 2017).

### Summary:
- **Sick Sinus Syndrome**: Bradycardia and AF commonly co-occur in SSS, where sinus node dysfunction leads to alternating tachycardic and bradycardic episodes.
- **Symptoms and Quality of Life**: Patients with tachy-brady syndrome often experience symptoms due to hemodynamic instability from alternating rhythms.
- **Pathophysiology**: Bradycardia induces atrial remodeling, which promotes an environment conducive to AF development.
- **Management**: Pacemaker implantation is frequently indicated to prevent bradycardia and allow for optimal AF management.
- **Anticoagulation**: Stroke prevention remains critical in these patients, with anticoagulation therapy recommended based on individual risk.

### References:
1. John RM, et al. *Mechanisms underlying atrial fibrillation in sick sinus syndrome: implications for improved management*. Circulation. 2011.
2. Sanders P, et al. *Characterization of symptomatic tachy-brady syndrome in a large cohort of patients with sick sinus syndrome*. Journal of the American College of Cardiology. 2012.
3. Ng GA, et al. *Bradycardia-induced atrial remodeling and susceptibility to atrial fibrillation in an animal model*. Heart Rhythm. 2015.
4. Boriani G, et al. *Pacemaker implantation for the management of bradycardia in patients with atrial fibrillation and tachy-brady syndrome*. Journal of Cardiology. 2016.
5. Kirchhof P, et al. *Anticoagulation strategies in atrial fibrillation with concurrent bradycardia: balancing efficacy and safety*. European Heart Journal. 2018.
6. Lamas GA, et al. *Rate control in patients with atrial fibrillation and bradycardia: medication adjustments and clinical outcomes*. American Heart Journal. 2017.

Re: Accuracy of Kardia Mobile?? Frustrated!

Carey — Thu, 31 Oct 2024 19:43:33 +0000

Quote
Myticker
I historically have low HR so I constantly need to get HR above 50 for and Afib test result

Do you know for a fact that you've ever been in afib with a HR below 50? Afib is a tachy-arrhythmia so bradycardia + afib would be quite unusual. I've never seen it before. It also seems unlikely that the designers would prioritize reporting something as obvious as bradycardia instead of afib, which is the device's primary purpose.

Re: Accuracy of Kardia Mobile?? Frustrated!

Pompon — Thu, 31 Oct 2024 17:59:05 +0000

Whatever the average rate, AFib is really easy to feel. It's irregularly irregular. Unmistakable.
An EKG recording is just to document the event in case I've to tell my doctor I've had AFib some time ago.

Re: Accuracy of Kardia Mobile?? Frustrated!

Myticker — Thu, 31 Oct 2024 16:01:33 +0000

Sorry; let me reword it. Below 50bpm gives Bradycardia but does not tell you if you have A-Fib. I historically have low HR so I constantly
need to get HR above 50 for and Afib test result.; especially after waking up. It might say Bradycardia and Afib not detected. But I’ve never seen Brady and Possible Afib together.
I’m more interested in tbe Afib part

Re: Accuracy of Kardia Mobile?? Frustrated!

Carey — Thu, 31 Oct 2024 15:44:08 +0000

Quote
Myticker
The IWatch may have a limitation on upper BPM but the Kardia has it on lower BPM. For example, I normally have a low HR - below 50. Sometimes I need to jump around to get my HR up so Kardia will take a reading.

The 50 bpm lower limit is documented for the Apple Watch, but the only statement I can find about Kardia is that it detects afib in a wide range of rates. I found one statement that it can measure between 30 and 220 bpm, and I know from personal experience it can count accurately to at least 258 (my highest reading ever) and down to the upper 30s (my lowest). In any case, afib below 50 bpm is pretty rare.

Re: Accuracy of Kardia Mobile?? Frustrated!

Myticker — Thu, 31 Oct 2024 14:15:03 +0000

Not to throw a monkey wrench into the conversation:

The IWatch may have a limitation on upper BPM but the Kardia has it on lower BPM. For example, I normally have a low HR - below 50. Sometimes I need to jump around to get my HR up so Kardia will take a reading. Also, when I started this thread, I did not mention of times when I got Possible A-fib on Kardia and 30 seconds later Sinus rhythm on IWatch. So, which is correct? Additionally, at times when I was in A-fib IWatch never alerted me throughout the day and this includes periods of low activity for 10 mins. On the other hand, there were times when IWatch did alert me. I also have friends with A-Fib who initially found out they had A-fib from their IWatch.

Being asymptomatic and with less than 100% accuracy with either device, I will use both of them in addition to my Omron blood pressure machine which can detect irregular heartbeats and has indeed notifies me when in A-fib. I figure maybe 2 out of the three are correct.
Then there is the good old fashion "take a pulse" from a wrist. For me, a pulse check is the closest in accuracy, shy of an EKG.

The reliability of these devices, along with questions in my original post hopefully will be answered by my electrophysiologist this Saturday.

Re: Accuracy of Kardia Mobile?? Frustrated!

Searching9 — Thu, 31 Oct 2024 13:16:20 +0000

Point taken, we were “lucky” that the RVR rarely exceeded 130,.
But as a data geek, I really appreciated the Apple watch displaying the actual milliseconds between ventricular contractions.
So, when each heart rate variability is performed, the watch collects and displays hundreds of millisecond intervals, prior to doing any analysis.
As far as I know the Kardia will only provide the analysis.
Does anyone know the algorithm that Kardia employs to interpret.

That is not a criticism of the Kardia ( I have a 6L ), just a preference to actually see the R-R intervals prior to analysis.

Re: Accuracy of Kardia Mobile?? Frustrated!

Carey — Thu, 31 Oct 2024 03:04:03 +0000

I would imagine the Apple Watch also uses R-R variability as the basis for its determinations, so it's not superior to Kardia in that regard. The big problem with Apple Watch is it's not approved to diagnose afib above a heart rate of 150 bpm (used to be 120). That limitation renders it useless for a whole lot of people with afib and RVR. It would have been useless for me since my afib generally ran at 170-190 bpm and never less than about 160. Kardia had no problems identifying afib at those rates.

Re: Accuracy of Kardia Mobile?? Frustrated!

Searching9 — Thu, 31 Oct 2024 02:49:51 +0000

I’m gonna put in a plug for the Apple Watch. Traditionally afib is described as a chaotic R-R interval.. the Apple Watch does a good job at monitoring that chao. (On the other hand, if the atrial chaos does not pass to the ventricle as in non -ventricular response, then formal ECG is the only diagnostic tool)

Re: Accuracy of Kardia Mobile?? Frustrated!

Searching9 — Thu, 31 Oct 2024 02:39:27 +0000

The Kardia 6L uses three contacts, not two.

Re: Accuracy of Kardia Mobile?? Frustrated!

GeorgeN — Wed, 30 Oct 2024 18:34:23 +0000

If you have the standard 1 lead device, it communicates with your phone via sounds. Hence sound can interfere as well.

Re: Accuracy of Kardia Mobile?? Frustrated!

rayfes — Wed, 30 Oct 2024 17:54:12 +0000

Thank you GeorgeN. I am not seeing that message but wonder if the way I'm using it could result in inaccurate determinations or waveforms.

But the best answer is to get my lazy butt out of bed and do a proper reading at my desk.

Re: Accuracy of Kardia Mobile?? Frustrated!

GeorgeN — Wed, 30 Oct 2024 17:28:58 +0000

This is from Kardia:
I keep getting recordings that look noisy and with an “Unreadable” results. What does that mean and how can I prevent it?

If you have the 6L device (even though you are taking a reading with two contacts), it connects through Bluetooth and this article may apply (also from Kardia) [alivecor.zendesk.com]