Effect of Timing of Coronary Angiography on Mortality After Out-of-hospital Cardiac Arrest in Elderly Patients - A Substudy of the TOMAHAWK Trial

Tharusan Thevathasan, Svitlana Pugachova, Janine Pöss, Michelle Roßberg, Ulf Landmesser, Carsten Skurk, Stephan Fichtlscherer, Ibrahim Akin, Georg Fuernau, Christian Hassager, Uwe Zeymer, Michael R Preusch, Tobias Graf, Hans-Josef Feistritzer, Alexander Jobs, P Christian Schulze, Suzanne de Waha, Holger Thiele, Anne Freund, Steffen Desch

Abstract

BACKGROUND: The optimal timing of coronary angiography in elderly patients after out-of-hospital cardiac arrest (OHCA) without ST-segment elevations after successful resuscitation remains uncertain. This substudy of the randomized TOMAHAWK trial investigated the prognostic impact of immediate versus delayed/selective coronary angiography in elderly versus younger OHCA survivors.

METHODS: A total of 529 patients with successfully resuscitated OHCA of presumed cardiac origin without ST-segment elevations on post-resuscitation electrocardiograms were analyzed. Patients had been randomized to immediate or delayed/selective coronary angiography after 24 hours the earliest. Patients were stratified by age: elderly patients defined as >75 years versus younger patients as ≤75 years. The primary endpoint was 30-day mortality. Multivariable Cox regression models were applied.

RESULTS: Elderly patients exhibited a greater burden of cardiovascular comorbidities, had higher 30-day mortality (69% vs. 43%, p<0.001) and higher rates of death or severe neurologic deficit (75% vs. 51%, p<0.001) compared to younger individuals. In adjusted analyses, the timing of coronary angiography was not significantly associated with mortality in either elderly patients (HR 0.96, 95% CI, 0.59-1.56, p=0.88) or younger patients (HR 0.88, 95% CI, 0.56-1.38, p=0.57), with no evidence of effect modification by age (p for interaction=0.758).

CONCLUSIONS: Routine immediate coronary angiography does not appear to modify mortality risk in both elderly and younger OHCA survivors without ST-segment elevations. The results do not support differential treatment strategies across age groups.

Original languageEnglish
JournalEuropean heart journal. Acute cardiovascular care
ISSN2048-8726
DOIs
Publication statusE-pub ahead of print - 07.11.2025

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