The resting electrocardiogram (ECG) furnishes essential information ... and attenuation of the QRS voltage in leads V2-V5.

The ECG strip below shows normal ... in the same direction (concordant) with the QRS complex = 5 points ST segment depression > 1 mm in leads V1, V2 or V3 = 3 points ST segment elevation > 5 ...

IRBBB (commonly characterised as an rSR′ pattern in V1 with QRS duration <120 ms ... is usually associated with other ECG abnormalities, such as T wave inversion involving the mid-precordial leads ...

A posterior wall MI shows ST depression, not elevation in leads V1 and V2 with an R ... three different P wave morphologies in one ECG with a QRS complex rate of > 100. Wandering atrial pacemaker ...

Department of Family Medicine, University of Washington, Seattle, Washington, USA Correspondence to Professor Jonathan A Drezner, Department of Family Medicine, University of Washington, P.O. Box ...

A 12-lead ECG is obtained ... between 0° and +90° (positive QRS complex in leads I and aVF). T waves that are tall and, most importantly, symmetric in leads V2-V5 (┴) are noted.