Jun 23, 2009 · These new findings, according to investigators, challenge previously held assumptions that PR prolongation or first-degree atrioventricular block is a benign prognosis.

The few human studies available (including studies during abstinence from cocaine) indicate that the PR interval remains either unaffected or slightly decreases in the setting of cocaine use, …

The effects of cocaine on PR interval and QRS complex width described in clinical studies generally contrasted the case report literature in which 11 cases of PR interval prolongation …

Sep 4, 2008 · The R-R interval is the same as the P-P interval plus whatever change there is in the PR interval. In typical AV Wenckebach phenomenon, the PR intervals increase with …

Apr 14, 2025 · Fewer data were available for ECG parameters but showed amphetamines were associated with decreased PR interval in children and adolescents; atomoxetine decreased …

Purpose: The association of methadone with Q-T interval prolongation and torsades de pointes (TdP) is reviewed, and recommendations for preventing Q-T interval prolongation in …

Mar 19, 2024 · The following PR interval ( ) is longer (0.36 sec), and the PR intervals become progressively longer thereafter until there is a nonconducted P wave (↓) after complexes 5 and …

Dec 12, 2025 · The authors found no predictive value of the baseline PR interval for intraprocedural block, but baseline PR intervals longer than 200 milliseconds and end-of …

Given the high prevalence and incidence of cocaine use, coupled with its frequent implication in drug-related deaths [4] and autopsy studies suggestive of fatal cardiac arrhythmias in such …

Oct 2, 2018 · The diagnosis is sinus tachycardia, short PR interval (enhanced AV conduction), and Duchenne muscular dystrophy. The rhythm is regular at a rate of 100 beats/min. A P wave …