Giant P waves

Giant P waves after pharmacological cardioversion of atrial fibrillation.

Propafenone, a class IC antidysrhythmic drug, is frequently used for pharmacological cardioversion of atrial fibrillation. Using IC antidysrhythmics to reverse recurrent atrial fibrillation is associated with a 3.5–20% incidence of atrial flutter with either ‘‘classical’’ or atypical patterns of atrial activation [1–3]. On the contrary, the appearance of peaked alternating with normal P waves i...

Giant negative T waves.

Marked T wave inversion in a life insurance applicant's ECG may suggest high risk. Careful analysis of the ECG, an informative attending physician statement, and judicious use of additional testing allows the medical director to put this striking ECG abnormality in its proper context.

Giant a waves

Giant fetal magnetocardiogram P waves in congenital atrioventricular block: a marker of cardiovascular compensation?

BACKGROUND Cardiogram signal amplitude is a key index of hypertrophy but has not been investigated extensively in utero. In this study, magnetocardiography was used to assess P and QRS amplitude in normal subjects and subjects with fetal arrhythmia. METHODS AND RESULTS The study cohort consisted of 68 normal fetuses and 25 with various arrhythmias: 9 reentrant supraventricular tachycardia (SV...

Non-conducted P waves.

Scenario: The following ECG waveform was obtained in an 85-year-old male patient admitted to the telemetry unit for evaluation of syncope. His pertinent medical history includes hypertension, coronary artery disease, and prior inferior/lateral myocardial infarction (MI). ECG PUZZLER A regular feature of the American Journal of Critical Care, the ECG Puzzler addresses ECG interpretation for clin...