ECG of an 80yo pt of ICH shows saw-tooth like waves, QRS complex of 80ms duration,
ventricular rate=150/min and regular R-R interval. What is the most porbable dx?
a. Atrial fib
b. Atrial flutter
c. SVT
d. Mobitz type1 second degree heart block
e. Sinus tachycardia
answer: B
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