- Abnormalities in cardiac function or clinically significant heart disease such as acute myocardial infarction or unstable angina within 6 months prior to the start of study treatment, heart failure New York Heart Association (NYHA) class III or IV, uncontrolled hypertension or a history of antihypertensive treatment poor compliance, uncontrolled arrhythmias with treatment, except extrasystoles or minor conduction disorders