Remember that T wave inversions and ST segment depression are normal in leads V1 to V3 in the presence of a right bundle branch block; thus, myocardial ischemia technically cannot be easily determined ...

Q: I recently had an electrocardiogram as part of a routine physical exam. The report said I had a bundle branch block. What does that mean? Will I need a pacemaker? A: Bundle branch blocks are ...

Atrial fibrillation with an uncontrolled ventricular response Left bundle branch block Premature ventricular contractions At times it can be difficult to distinguish "SVT with aberrancy" from ...

A right bundle branch block (RBBB) involves a delay in the electrical impulses reaching the heart’s right ventricle, which can affect the heart’s ability to pump blood effectively. While RBBB doesn’t ...

Left bundle branch block (LBBB) is a type heart block. It results from a problem with the electrical conduction system that enables the heart to beat. It may cause no symptoms, but an ...

DEAR DOCTOR K: I recently had an ECG that showed that I have a "left bundle branch block." What does this mean? DEAR READER: When your heart beats, it does so in response to electrical signals. Your ...

Impulses, or electrical signals, travel through both the left and right chambers of your heart to make it pump. But if the pathway is blocked, the impulses may move slower than normal or irregularly.

A specialist tells how to interpret subtle changes on the ECG, including those caused by two life-threatening syndromes you might otherwise miss. Reading ECGs is like learning to appreciate art—it is ...

An ST depression is a possible outcome of an electrocardiogram (ECG) test. It can indicate health conditions such as hypokalemia, myocardial ischemia, or a side effect of medications. Doctors may ...