Table 4.

Risk Stratification Based on Noninvasive Testing (according to [18])

Risk	Parameters
High Risk >3% annual mortality rate	1. Severe resting left ventricular dysfunction (LV EF < 35 %)
	2. High-risk treadmill score (score ≤ -11)
	3. Severe exercise left ventricular dysfunction (exercise LV EF < 35 %)
	4. Stress-induced large perfusion defect (particularly if anterior)
	5. Stress-induced multiple perfusion defects of moderate size
	6. Large, fixed perfusion defect with LV dilation or increased lung uptake (thallium-201)
	8. Echocardiographic wall motion abnormality (involving > two segments) developing at low dose of dobutamine (≤10 mg/kg/min) or at a low heart rate (<120 bpm)
	9. Stress echocardiographic evidence of extensive ischemia
Intermediate Risk 1–3 % annual mortality rate	1. Mild/moderate resting left ventricular dysfunction (LV EF = 35–49%)
	2. Intermediate-risk treadmill score (-11 < score < 5)
	3. Stress-induced moderate perfusion defect without LV dilation or increased lung intake (thallium-201)
	4. Limited stress echocardiographic ischemia with a wall motion abnormality only at higher doses of dobutamine involving ≤ two segments
Low Risk < 1% annual mortality rate	1. Low-risk treadmill score (score ≥ 5)
	2. Normal or small myocardial perfusion defect at rest or with stress
	3. Normal stress echocardiographic wall motion or no change of limited resting wall motion abnormalities during stress