Category: ECG / Electrophysiology

Segments and Intervals in an ECG Segments and Intervals in an ECG: A segment in an electrocardiogram is the region between two waves. PR segment begins at the

Waves in an Electrocardiogram The usual waves in an ECG are P, QRS and T waves. P waves represent depolarization of the atria. QRS represents the depolarization of

Left Bundle Branch Block (LBBB) and STEMI criteria Left Bundle Branch Block and STEMI criteria: Left bundle branch block is manifested on the ECG with wide QRS with

Mahaim fibre tachycardia: Mahaim fibres do not conduct retrogradely. So tachycardia is always with wide QRS complexes, LBBB pattern.

Truncus arteriosus is a CCHD in which one single great vessel with a single semilunar valve gives rise to the aorta, PA and the coronary arteries.

Resolution of RBBB in AWMI – Serial ECG Serial electrocardiographic evaluation is needed while managing patients with acute coronary syndrome. All changes in ECG need produce variation in

Giant T wave inversion can be broad and deep or just deep T inversions. A depth of T wave of 10 mm or above is generally considered as

Comprehensive article on atrial septal defect with ECG, chest X-ray and echocardiograms with video.

A prominent R wave in lead aVR (aVR sign in Brugada syndrome) has been suggested as marker for development of life threatening arrhythmic events.

Digoxin toxicity has become far less common as the use of digoxin, especially that of the loading dose has come down.