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Re: SVT and antibiotics - 3 months ago

Just to wind this up: SVT ended after 70 hours, for no obvious reason Coincidently, the first episode began about 12 hours after the first dose of Doxy, and the SVT episode ended about 14 hours after suspending the Doxycycline. Cause and effect ????? Unless we repeat the sequence we will not know. BUT we are unwilling to repeat the sequence for experimental purposes. Thanks,

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Re: SVT and antibiotics - 3 months ago

yeah, that's what I suspected at first, then I saw this: (from website Drugs.com) "loss of appetite, upper stomach pain (that may spread to your back), tiredness, nausea or vomiting, fast heart rate, dark urine, jaundice (yellowing of the skin or eyes)." when looking for Doxy side effects.

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SVT and antibiotics - 3 months ago

Wife is very pleased with her maze (Cleveland clinic) last September.. However, most recently she began a run of SVT (50 hours at 120. To 130 bpm) that MAY have been initiated by Doxycycline for an UTI . Has anyone here observed elevated HR associated with antibiotics?

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Afib.Aflutter, Tachy ECG recognition Lesson - 5 months ago

For those interested, nice presentation of ECG recognition

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Re: Effectiveness of Photoplethysmography-based Rhythm Monitoring after Atrial Fibrillation Ablation using a Smartphone Application: DIGITOTAL-Study - 5 months ago

Sorry, foolish question...

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Re: Interesting Post Ablation Tachycardia Pattern - 5 months ago

my sincerest thanks to you !

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Re: Effectiveness of Photoplethysmography-based Rhythm Monitoring after Atrial Fibrillation Ablation using a Smartphone Application: DIGITOTAL-Study - 5 months ago

I'm not a math expert but this report seems to support the notion that photoplethysmohgraphy is reasonably useful to detect AFIB events.

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Re: Interesting Post Ablation Tachycardia Pattern - 5 months ago

I've been messaging her doctor, asking the question about how urgent should these episodes of high heart rate are. Unfortunately her EP is in Cleveland (two hours ways) so I can't count on her having a episode that would persist until we arrived at Cleveland. We did go to our local hospital who ran an ECG and then were told to wait for "our turn" in 2-3 hours. During that w

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Re: Interesting Post Ablation Tachycardia Pattern - 5 months ago

My wife is just 60 days from her Maze (and Aortic Valve replacement) and we are seeing episode of tachycardia that seem to come from "out-of- the-blue" and are wondering if this is abnormal. After days of HR 70-80, abrupt increase to 120-130 over a period of minutes. Similarly, abrupt decreases from 125, and two minutes later drops to 75 and stays there for hours and hours. The activi

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Re: Odd Kardia reading - 5 months ago

Lead I is the voltage difference between the LA and RA electrodes (LA – RA), directed towards LA at zero degrees. Lead II is the voltage difference between the LL and RA electrodes (LL – RA), directed towards LL at +60 degrees. The OP’s displayed recordings would point to a problem with the left leg (LL) contact,. See suggestions above, including muscular twitching of the left leg. Persponall

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Re: Odd Kardia reading - 5 months ago

My WAG is that there was significant electrical interference , however the lead I ftrace was filtered to cleanup the trace. Check to see if lead I is filtered while others may not br.

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Re: is Watchman necessary? - 5 months ago

Thanks Cary, OK, glad we have a common understanding of "isolated". (I hope you can understand why I found that confusing)

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Re: AFIB burden, measured by Apple Watch Series IX - 5 months ago

Hi Susan, we have used ZIO patch 3 times (twice for 14 days and once for 30 days) while simultanously monitoring with the apple watch. In all three cases the ZIO calculated burden matched the Apple within +/- 5 points. The EP was satisfied that we could monitor the burden (on a weekly basis) using the apple watch - however if he were to recommend a procedure that was covered by insurance he wou

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Re: AFIB burden, measured by Apple Watch Series IX - 5 months ago

Just to be clear, I'm not referring to the interpretation of AFIB from an ECG on the apple watch. Rather (it would seem) that the AFIB burden is calculated independently of the ECG. It would appear that the Heart rate variability is the major (and perhaps only) input used to formulate an AFIB history. Hence my question, when is a HRV observation flagged as AFIB (for purposes of aggregatin

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Re: is Watchman necessary? - 5 months ago

I'd like a clarification on what you wrote above: QuoteCary Also, there are patients (like me and others here) who are at high risk of stroke by missing even one or two doses because we've had our LAAs isolated Are you saying that patients who have had their LAA isolated (clipped or ligated) are at an inherently higher risk of stroke as compared to patients who have not had their

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AFIB burden, measured by Apple Watch Series IX - 5 months ago

In addition to calculating the Heart Rate Variability (Apple uses the 1 standard deviation of a series of consecutively measured R-R intervals) , the watch also calculates a weekly AFIB burden (time spent in AFIB over the previous 7 days). Presumably the input for the AFIB burden is some level of heart rate variability, above which the watch considers the wearer to be in AFIB. Does anyone

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Re: Valvular versus non valvular AFIB differential diagnosis - 5 months ago

Thanks Cary

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Re: Accuracy of Kardia Mobile?? Frustrated! - 5 months ago

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.

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Re: Valvular versus non valvular AFIB differential diagnosis - 5 months ago

Thanks Cary Is it your sense that the valve in question is the mitral, as opposed to the any of the other 3 valves? If a diagnosis were clearly valvular AFIB, then the correction of the valve is priority. (Of course this is just my non-expert opinion!)

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Valvular versus non valvular AFIB differential diagnosis - 5 months ago

It seems obvious that valvular AFIB, would likely not be successfully treated with ablation of the pulmonary veins. So the diagnosis of valvular AFIB Ihas particular significance. How is valve derived AFIB diagnosed to differentiate between non-valve?

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Re: Accuracy of Kardia Mobile?? Frustrated! - 5 months ago

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)

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Re: Accuracy of Kardia Mobile?? Frustrated! - 5 months ago

The Kardia 6L uses three contacts, not two.

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Re: Accuracy of Kardia Mobile?? Frustrated! - 5 months ago

Today’s monitors do not require “wires”. Just my personal observation, but Dr’s office ECG can be interpreted as AFIB at the beginning of an office visit but 30 minutes can be interpreted as NSR on the same machine with the same electrodes. Go figure !

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Question about post ablation blanking period - 6 months ago

I understand that afib episodes during the blanking period should not be used to qualify the success / failure of ablations, but what I’m asking iabout is the therapy during that blanking period. During the blanking period is rhythm control therapy (example tikosyn or similar) discontinued or withheld? Or should a decision to discontinue rhythm control be made after the blanking period.?

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Re: Fast then slow resting HR - 6 months ago

Be careful using the terms Heart Rate variability. In one context, variability in the context of resting versus active Orr exercise, a high degree of variability is healthy. However, in another context, high heart rate variability at rest is problematic and clearly a sign of probable AFIB. At rest, a persons ventricles should beat in a nice even and constant rhythm. The pause between each in

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Re: underlying rhythm when heart is in AFIB - 6 months ago

Indeed that what I meant to convey. When she was converted (for about 20 hours post surgery) she was as in a rhythm that was absent of a P wave. The rate started at her first beat (after conversion) was 6 seconds. Next beat was 4 seconds, next beat was 3 seconds later and eventuallly settled out to 1 second between beats (suggestive of 60 bpm). So the activated the temporary pacer at 80 bpm for

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underlying rhythm when heart is in AFIB - 6 months ago

Dear wife had a valve replacement with maze and LAA clipped. Left surgery in junctional rhythm, followed by AFIB. Tten days later DRs cardioverted her successfully, she when converted but was in junctional rhythm the very first rate was 20s, followed after with 30-40 and after 60 minutes was stable with junctional at 60-70. The following day, she was being lifted out of bed by three orderli

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Re: Tracking afib&heart rate on Apple Series IX watch. - 9 months ago

@Carey, JakeS, George N: Finally found someone at Apple that was able to clarify. The normal "touch the heart icon" on the watch face: captures and counts the number of beats for the next 5 seconds and multiplies by 30 to report and record the heart rate. That value is NOT influenced by what occurred before. And each time the display is updated it only looks at the number of beats

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Re: Tracking afib&heart rate on Apple Series IX watch. - 9 months ago

Hi Jake, Re: "nurse", the pulse rates were taken by a CNA, not an RN. But that is beside the point, the point is that the apparent pulse rate can vary as a function of the period of time of observation. In the first case beats "averaged" over 15 sec versuis beats "averaged" over 60 seconds. That distinction is important to understand when attempting to report BPM f

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Re: Tracking afib&heart rate on Apple Series IX watch. - 9 months ago

My immediate objective is to understand how the Apple watch reports the heart rate in their phone application. Is it an counting of QRS complexes during a period of time? and if so what is that period of time. (for example, if I count the number of QRS complexes on my 6L Kardia for the first 15 second, and then do the same for the next 15 seconds, I can get two different BPM when the R-R int

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