Emergent Cardiac Catheterization in Comatose OHCA Patients with STEMI

Primary Evidence Base

The American Heart Association recommends emergent cardiac catheterization as a Class I indication for comatose OHCA patients with STEMI post-ROSC, as over 80% have an acute coronary lesion requiring intervention, and immediate catheterization significantly improves both survival and neurologically favorable outcomes, even in comatose patients 1, 2, 3
Improved survival to hospital discharge is observed when emergency catheterization is performed versus delayed or no catheterization, according to the International Consensus on Cardiopulmonary Resuscitation 1, 2, 4
Improved neurologically favorable outcomes are achieved with emergency intervention, as demonstrated by 9 studies involving 2,819 patients 1, 2

The American Heart Association emphasizes that emergency catheterization should be incorporated into a standardized post-cardiac arrest protocol alongside targeted temperature management (TTM) 5, 4
The evidence demonstrates feasibility and safety of combining emergency catheterization with early implementation of TTM, and patients should not be delayed for TTM initiation or hemodynamic optimization 5, 4
Minimizing door-to-reperfusion times is crucial, and patients should be managed similarly to the general STEMI population regarding time targets 4

The evidence base involved selected patients with certain favorable characteristics, including witnessed arrest, VF as presenting rhythm, and receipt of therapeutic hypothermia 5, 4
The guidelines prioritize survival and neurologically favorable outcomes over resource utilization, despite the observational nature of the evidence 5

The American Heart Association recommends direct transport to PCI-capable centers for OHCA patients with STEMI (Class I, LOE C-LD) 3
Prehospital catheterization laboratory activation is recommended when STEMI is recognized on prehospital ECG, and non-PCI-capable facilities should be bypassed when first medical contact-to-balloon times <90 minutes are achievable 3

The recommendation achieves Class I status due to the large and consistent magnitude of benefit across numerous studies, addressing a reversible cause of cardiac arrest with proven mortality benefit in the general STEMI population 5, 1, 2
Outcomes prioritize survival and neurological recovery, which showed significant improvement with early intervention, with a strength of evidence that supports the Class I designation 5, 4, 1, 2

The American Heart Association recommends emergency coronary angiography for OHCA patients with suspected cardiac etiology and ST-elevation on ECG (Class I, LOE B-NR) 6, 7, 8.
The American College of Cardiology and American Heart Association guidelines recommend that patients with cardiac arrest and STEMI who have been resuscitated should preferentially be transferred by EMS to a PPCI-capable center (Class I, LOE C-LD) 9, 10.

EMS should bypass closer non-PCI-capable facilities to transport directly to PCI centers when first medical contact-to-balloon times can be achieved in <90 minutes and transport times are relatively short (<30 minutes) 6, 7.
Field 12-lead ECG acquisition with transmission to the receiving hospital is recommended to facilitate early catheterization laboratory activation 6, 7, 8.

Obtain 12-lead ECG immediately after achieving ROSC, and if ST-elevation is present, activate catheterization laboratory and arrange direct transfer to PCI-capable center 6, 7, 9.
For patients who are awake/noncomatose after ROSC with STEMI, proceed immediately to primary PCI (outcomes comparable to STEMI patients without cardiac arrest) 9, 10.
For comatose patients with favorable prognostic features and STEMI, proceed to primary PCI to improve survival (Class I, LOE B-NR) 9, 10.

Do not delay transfer or catheterization for hemodynamic optimization—proceed to cath lab while simultaneously managing hypotension 11.
Do not delay transfer or catheterization for initiation of therapeutic hypothermia—this can be safely combined with PCI 12, 11, 13.
Direct transfer to PCI centers is associated with improved survival compared to initial presentation at non-PCI hospitals with subsequent transfer 13, 14.