The following question refers to Section 7.1 of the 2025 ACS Guidelines.

The question is asked by Thomas Jefferson medical student and CardioNerds Academy Intern Dr. Grace Qiu, answered first by University of Michigan fellow and CardioNerds FIT Ambassador Dr. Kayla Secrest, and then by expert faculty Dr. Sunil Rao.

Dr. Rao is an interventional cardiologist, Professor of Medicine at NYU Grossman School of Medicine, Deputy Director of the Leon H. Charney Division of Cardiology, and the Director of Interventional Cardiology for the NYU Langone Health System. He is the Editor-in-Chief for Circulation Cardiovascular Interventions and was the Chair of the Writing Committee for the 2025 ACS Guidelines.

This episode is part of our comprehensive Decipher the Guidelines Series covering the 2025 ACC/AHA/ACEP/NAEMSP/SCAI Guideline for the Management of Patients With Acute Coronary Syndromes.

Question #1

A 68-year-old man with a history of hypertension, hyperlipidemia, stage III chronic kidney disease, and prior tobacco use presents to a local emergency department with reports of chest pain while raking leaves at home. Upon arrival, he is hemodynamically stable with a heart rate of 86 beats per minute and a blood pressure of 133/85 mmHg. His EKG reveals ST elevations in the septal and anterior leads (V1-V4). He is given 324mg of aspirin and is promptly evaluated by the interventional cardiology team, who elects to take him emergently to the catheterization lab. Upon arrival to the catheterization lab, the nurse asks the interventional fellow which access sites they should prep for this case? How should the interventional fellow respond?
A	Right radial artery only
B	Radial + bilateral femoral
C	Bilateral femoral only

Answer #1

Explanation

The correct answer is B. Radial and bilateral femoral

Radial artery access is the preferred vascular access site for coronary angiography and PCI in patients with ACS. Transradial access has been shown to reduce mortality, bleeding, and vascular complications compared with transfemoral access (Class I, LOE A). Radial access also allows earlier ambulation and is associated with greater patient comfort.

Although the right radial artery is the most widely studied upper-extremity access site, alternative sites such as the ulnar and distal radial arteries have demonstrated similar outcomes.

However, the radial artery may be required as a bypass conduit for CABG. In institutions where the radial artery is routinely used for surgical grafting, this potential future use should be considered when selecting vascular access.

In addition, transfemoral access—preferably performed with ultrasound guidance—should be considered in patients in whom temporary mechanical circulatory support (MCS) is anticipated or in those for whom radial access is not feasible due to anatomical or technical constraints. Prepping bilateral groins in addition to the radial artery provides a backup strategy for urgent MCS placement or for transition to femoral access should radial access fail.

For these reasons, prepping both the radial artery and bilateral groins is the most appropriate response.

Radial-only preparation is incorrect because, although radial access is preferred, patients with STEMI may still require emergent MCS or alternative access if the radial artery is unsuitable. Preparing only the wrist without backup femoral access may delay care should hemodynamic instability occur.

Femoral-only preparation is incorrect because transradial access provides superior outcomes in ACS, including significant reductions in all-cause mortality, major bleeding, and vascular complications. RCTs and meta-analyses, including MATRIX (which showed lower MACE and net adverse clinical events with radial access) and SAFARI-STEMI (which showed no difference in mortality but was underpowered)—support radial as first-line access when feasible.

Main Takeaway

For patients with ACS undergoing PCI, radial access is strongly preferred to reduce mortality, bleeding, and vascular complications.

Guideline Loc.

Section 7.1

453. ACS Guidelines Question #1 with Dr. Sunil Rao

Cardionerds: A Cardiology Podcast

453. ACS Guidelines Question #1 with Dr. Sunil Rao