Question:
Identify the condition shown in the ECG.
Identify the condition shown in the ECG.
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Regular sawtooth F-wave baseline with a regular ventricular rate.
Updated On: Jun 23, 2026
- Atrial fibrillation
- Arrhythmia
- Atrial flutter
- Cardiomyopathy
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The Correct Option is C
Solution and Explanation
Step 1: The ECG shows atrial flutter. It is a cardiac dysrhythmia marked by rapid but regular atrial depolarisation.
Step 2: The hallmark is the sawtooth (F-wave) baseline, classically best seen in the inferior leads, with a regular ventricular response. Atrial flutter is divided into type I (typical) and type II (atypical).
Step 3: Why the distractors are wrong: atrial fibrillation gives an irregularly irregular rhythm with a chaotic fibrillatory baseline and NO organised flutter waves; cardiomyopathy is a structural muscle disease, not a single ECG pattern; and arrhythmia is a non-specific umbrella term, not a specific diagnosis. The organised regular sawtooth pattern is diagnostic of flutter.
Step 2: The hallmark is the sawtooth (F-wave) baseline, classically best seen in the inferior leads, with a regular ventricular response. Atrial flutter is divided into type I (typical) and type II (atypical).
Step 3: Why the distractors are wrong: atrial fibrillation gives an irregularly irregular rhythm with a chaotic fibrillatory baseline and NO organised flutter waves; cardiomyopathy is a structural muscle disease, not a single ECG pattern; and arrhythmia is a non-specific umbrella term, not a specific diagnosis. The organised regular sawtooth pattern is diagnostic of flutter.
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