Bundle Branch Block, Left

CARDIOLOGY, ECG

Left Bundle Branch Block (LBBB) Criteria for complete LBBB in adults from the AHA/ACC. QRS ≥ 120 msec (or 110-119 for incomplete BBB) I, aVL, V5-V6: Presence of broad, slurred, monophasic R wave. ± RS in leads V5-V6 in patients with cardiomegaly. I, V5-V6: Absence...

Poor (slow) R Wave Progression

CARDIOLOGY, ECG

Poor R wave progression (PRWP) refers to the absence of the normal increase in the size of the R wave in the precordial leads from lead V1 to V6. Normal or expected pattern As you go from V1 to V6, the height of R wave normally becomes progressively taller from leads...