Cardiology Diagnostic Testing
<p>The <b>Duke treadmill score</b> is one method to further risk stratify:
 
<b>Exercise time in minutes − (5 × ST-segment depression) − (4 × angina score)</b>
 
<b>Angina score: 0 = asymptomatic; 1 = nonlimiting angina; 2 = exercise-limiting angina</b>
 
<b>Scores below −11 are high risk, and those above 5 are low risk</b>.
 
Patients with <b>high-risk scores</b> are likely to have <b>left main</b> or <b>proximal left anterior descending (LAD) artery disease</b>. Other markers of a high-risk exercise study that would be suggestive of proximal LAD artery disease or multi-vessel disease would include a <b>drop in blood pressure with exercise</b> or <b>severe ST-segment depression</b>.</p>