Arrhythmia Atrial Flutter Bradycardia 
Cardiomatics
APRIL 5, 2024
Sinus bradycardia – sinus rhythm below 60 bpm is a sinus bradycardia. AFIB/AFL – atrial fibrillation or atrial flutter episodes. Other times, an irregular recording can signal a medical emergency, such as a myocardial infarction or a dangerous arrhythmia. Usually does not exceed 160 bpm.
Dr. Smith's ECG Blog
DECEMBER 23, 2019
The WCT is interrupted by a series of variable-morphology QRS complexes, with atrial flutter waves note in II, III, and aVF. Detail of Flutter waves The rate of the flutter waves matches the rate of the WCT (about 200/m), proving that the presenting WCT had been 1:1 atrial flutter.
Dr. Smith's ECG Blog
DECEMBER 16, 2018
Instead, the rate of 150, plus the history of AF, suggested atrial flutter. A close inspection of lead II showed P or flutter waves at a rate of about 300 bpm, also supporting atrial flutter. There appear to be flutter waves at a rate of 300. Flecainide encourages new atrial flutter.
Ken Grauer, MD
DECEMBER 23, 2023
Since the most common ventricular response to untreated AFlutter is with 2:1 AV conduction — this results in a ventricular rate HALF as fast as the flutter rate in the atria — and 300 ÷ 2 ~150/minute ( usual range ~130-170/minute ). ECG Blog #242 — Reviews rate -related BBB. ECG Blog #32 — More on rate-related BBB.
Dr. Smith's ECG Blog
APRIL 8, 2015
PVCs N ot generally considered abnormal ECG findings: Isolated PAC, First Degree AV Block, Sinus bradycardia at a rate of 35-45, and Nonspecific ST-T abnormalities (even if different from a previous ECG). Thus, if there is documented sinus bradycardia, and no suspicion of high grade AV block, at the time of the syncope, this is very useful.
Dr. Smith's ECG Blog
FEBRUARY 6, 2025
The possibility of an ischemic cause of the ventricular arrhythmia has to be considered! Below in Figure-5 is a 10-minute continuous lead II recording on oral Flecainide, now showing sinus bradycardia without a single PVC! A workup was undertaken in search of a cause of the patient's ventricular arrhythmia. No PVCs are seen.
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