Questions tagged [heartbeat]

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How to determine the "argument" of the electrical axis of the ECG from aVF & VI

This question is a continuation of the following question; Is the definition of aVF consistent with Novosel’s formula? Unfortunately, the article at the following URL is written in Japanese, but its ...
Blue Various's user avatar
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Is the definition of aVF consistent with Novosel’s formula?

"In regards to the electrocardiogram, there is often a Statement made that, 'The a' in aVF means 'augmented' by a factor of 1.5 for sensitivity adjustment. If the above statement is true, ...
Blue Various's user avatar
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Why do ventricular action potentials have no local potentials like neuronal action potentials?

I noticed that the depolarization in the ventricular action potential (bottom image) is just a sharp spike, with no local potential that gradually achieves the threshold potential (like the top image, ...
Doe Pull's user avatar
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EKG reading question [closed]

Can someone tell me what "ETRSR1-RSR' in V1 or V2, right VCD or RVH-QRS area positive & R' V1/V2 " means? In other comments it also said "otherwise normal EKG"
Ashely Cox's user avatar
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What if our hearts didn’t pulse?

Let’s say we used an electric pump that’s smart enough to adjust the blood flow according to the needs of the body. What would be the effects on our organs? Would we survive without the beats? I just ...
DeepBlue's user avatar
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Why do semilunar valves not need tendinae but atrioventricular valves do?

Inside the heart the atrioventricular valves (AV) have chordae tendineae to prevent the backflow of blood into the atrium when the ventricle contracts. Since the AV and semilunar valves are ...
John Hon's user avatar
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Difference in heart muscle tissue growth (cardio vs low-rep intense weight lifting)

Below is a quote from a subreddit that says: I haven't kept up on the research, but the last thing I read back in college looked at weight lifters and long distance runners. Both types had larger ...
ZenVentzi's user avatar
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Heart Sound Samples

Does anybody have helpful sources/links that are basically recordings and playbacks of heart sounds (normal/ abnormal/ etc.) that I could just listen to while in my spare time? I am looking for ...
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How wrist wearables count breaths?

I am doing a research about wrist wearables in order to understand how they work. They can be used to measure stress levels, just like pupillometry, skin conductance and other related measures can be. ...
alexisicte's user avatar
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Does a cold or flu typically affect resting heart rate?

Background I have had a Fitbit heart tracker for several months. Typically, it reports my resting heart rate around 60 bpm, with a standard deviation of 1-2 bpm. A month ago, I got some kind of ...
jvriesem's user avatar
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Why consciousness is lost immediately when heart stops beating?

When heart stops beating - consciousness is lost in seconds. It is explained that it is due to the drop of blood pressure in brain veins. However, by my understanding - that should only make brain ...
Draif Kroneg's user avatar
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Feel my heart beating even when resting, happened after drinking [closed]

I'm 15 years old and a male from Sweden. For the last 2 werks I've been starting to party and drink with my friends. But i have never gotten "drunk" more preferably "a bit happy". But for 3 days ago i ...
T. Dahlen's user avatar
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How does the heart rate change during REM and non-REM stages?

I read different references and I understand that the average heart rate during sleep decreases by some beats per minute. The heart rate is slower in non-REM stage than REM but I found no measurements ...
Rorrro's user avatar
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Is it possible for the lungs and heart to work independently of one another?

I understand that the lungs take in oxygen, pass it to the heart to send throughout the body, and receive CO2 from cellular respiration that the lungs then breathe out. (Oversimplified, I know, but ...
DonielF's user avatar
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Period between Heart lub-dup sound S1 and S2

Just curious not asking a professional opinion, Does anyone know the average time difference between S1 and S2 sounds of the heart the so called lub-dup sound? I believe its around 150 milliseconds. ...
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Why doctor wont put stethoscope stationary at one point?

Doctor so often changes stethoscope on body, Then how can he\she identify heart beat rate?
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Heartbeat pulse strength vs Alcohol

Recently the elevator got broken at my place and it's been a few days of using stairs. I live on the 5th floor. I noticed.. actually I didn't notice anything when going up and down the stairs during ...
Thomas's user avatar
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