Lit Matters 3: Moderate HEART Scores With/Without CAD

Moderate HEART scores do not all carry the same ACS risk. In possible acute coronary syndrome, a patient with HEAR 4 or higher, negative serial troponins, a nonischemic ECG, and no prior coronary artery disease had a low 30-day MACE rate in this study.

Moderate HEART Score Risk Stratification

• Prior CAD as discriminator: Known coronary artery disease meaningfully changes post-test risk: among moderate-risk patients, 30-day MACE was 7.1% with prior CAD versus 1.4% without it.
• True moderate-risk definition: The study’s moderate-risk group was not troponin-positive ACS; it was HEAR score 4 or higher with negative 0- and 3-hour troponins and a nonischemic ECG.
• Objective testing rethink: Moderate-risk patients without prior CAD may not need routine objective coronary testing after ED evaluation, a disposition nuance we get into in the episode.
• Negative likelihood ratio signal: In moderate-risk patients without prior CAD, the negative likelihood ratio for 30-day MACE was 0.08, a rule-out signal strong enough to support discharge conversations.
• Missed-event context matters: Several adverse events in the no-CAD group were tied to protocol violations, noncardiac death, or revascularization without MI, an important caveat behind the headline reassurance.