Healio

Atrial Arrhythmias ECG 7

This is a narrow-complex QRS rhythm which is quite fast. Looking closely at the last part of the QRS complex in leads V1 and V2, P waves can be seen. This is considered a "short RP tachycardia" and is ...
Healio

Atrial Arrhythmias ECG 31

Note the premature ventricular contraction (PVC) that triggers the AVNRT in this ECG. If a premature atrial contraction (PAC) or premature ventricular contraction (PVC) occurs at the right time, the ...
AHA/ASA Journals

The Illusion of Sinus Rhythm With a Prolonged PR Interval: What Lies Beneath the Notch in V1?

A 68-year-old man without previous comorbidities presented to the emergency department with complaints of palpitations and giddiness. On examination, his pulse rate was 92 beats per minute, and his ...
Medscape

ECG Challenge: Think Fast -- What's Going On in This ECG?

The initial part of the ECG shows a regular narrow complex tachycardia at a rate of 160 beats/min. The QRS complex duration is normal (0.08 sec) and there is normal morphology and normal axis between ...