Arrhythmia Bradycardia Physiology 
Cardiomatics
APRIL 5, 2024
Then, the current flows to an area known as the bundle of His, which divides into two branches (LBB and RBB) and is the only physiological pathway connecting the atria with the ventricles. Sinus bradycardia – sinus rhythm below 60 bpm is a sinus bradycardia. Usually does not exceed 160 bpm.
Ken Grauer, MD
DECEMBER 23, 2023
KEY Point: Knowing that the most commonly overlooked arrhythmia is AFlutter — suggests that the BEST way to avoid missing the diagnosis of AFlutter is simply to THINK of AFlutter whenever you have a regular SVT at a rate close to 150/minute ( in which you do not clearly see upright sinus P waves in lead II ).
Dr. Smith's ECG Blog
JANUARY 23, 2024
VT is the second most common presenting arrhythmia. Vaso or inotropic medications are not harmless, and can precipitate life threatening arrhythmias. The physiologic reason for this — is thought to be the result of momentarily increased circulation from mechanical contraction arising from the "sandwiched in" QRS complex.
Dr. Smith's ECG Blog
JANUARY 5, 2024
The ECG shows sinus bradycardia but is otherwise normal. Written by Willy Frick A 46 year old man with a history of type 2 diabetes mellitus presented to urgent care with complaint of "chest burning." The documentation does not describe any additional details of the history. The following ECG was obtained. ECG 1 What do you think?
All About Cardiovascular System and Disorders
MAY 2, 2024
It is a physiological adaptation helping athletes perform physical tasks better than non-athletes. Athlete’s bradycardia due to increased parasympathetic tone and decreased sympathetic tone is a well-known observation. The upper limit of physiologic cardiac hypertrophy in highly trained elite athletes. References 1.Prior
Dr. Smith's ECG Blog
NOVEMBER 11, 2024
If there is PR prolongation from one to the next, this supports Mobitz I physiology which rarely benefits from pacing. Conversely, if the PR interval is constant , this supports Mobitz II physiology, which is an indication for pacing. This pattern can be seen in both Mobitz I and Mobitz II physiology. History is often helpful.
Dr. Smith's ECG Blog
OCTOBER 13, 2022
In other cases, the bypass tracts conduct intermittently, depending upon other factors such as cardioactive medication use, physiological stressors with catecholamine release, the development of coronary ischemia, and normal aging.”[3] Delta waves are seen in 11/12 leads.
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