Archives

A cardiac rhythm that originates from the AV junction with a rate > 100/minute; QRS complex is most often narrow with P waves that are Read More

The heart is encased in two protective layers. The outer layer, the pericardial sac, covers the heart. It folds in on itself at the aorta Read More

Modified Central Lead (MCL1) – The modified central lead is created by placing the positive electrode at the 4th intercostal space just to the right Read More

Every lead view of an ECG has a positive electrode. The heart is viewed electrically from the vantage point of the positive electrode. The positive Read More

Locating the positive electrode is crucial to determining which area of the heart is viewed electrically. Metaphorically, the positive electrode serves as a mini-video camera Read More

A major artery that serves the left ventricle, travelling along the left anterior epicardial surface of the heart. In order to beat over 100,000 times Read More

A notched P wave in lead II with increased amplitude to the latter aspect of the P wave (left atrium) suggests left atrial enlargement. Atrial Read More

A bundle branch block must satisfy two criteria – a wide QRS complex and a notch in the QRS complex. To distinguish between a RBBB Read More

Several major vessels enter and exit the heart. The arteries carry blood away from the heart while the veins bring blood to the heart. While Read More

The right ventricle ejects blood through the main branches of the left and right pulmonary arteries to the lungs. The main vessel feeding the right Read More