digitoxin and Pre-Excitation-Syndromes

Inverted T waves produced by myocardial ischemia are classically narrow and symmetric. T-wave inversion (TWI) associated with an acute coronary syndrome (ACS) is morphologically characterized by an isoelectric ST segment that is usually bowed upward (ie, concave) and followed by a sharp symmetric downstroke. The terms coronary T wave and coved T wave have been used to describe these ischemic TWIs. Prominent, deeply inverted, and widely splayed T waves are more characteristic of non-ACS conditions such as juvenile T-wave patterns, left ventricular hypertrophy, acute myocarditis, Wolff-Parkinson-White syndrome, acute pulmonary embolism, cerebrovascular accident, bundle branch block, and later stages of pericarditis.

Topics: Adult; Aged; Arrhythmias, Cardiac; Bundle-Branch Block; Chest Pain; Coronary Disease; Diagnosis, Differential; Digitalis; Electrocardiography; Female; Humans; Male; Middle Aged; Pre-Excitation Syndromes; Pulmonary Embolism; Stroke