Heart disease can be screened for arrhythmias or myocardial ischemia through an electrocardiogram (ECG) or a Holter monitor. One can also examine the heart using echocardiography to check if the atria or ventricles are enlarged, the condition of the heart valves whether they are narrowed or regurgitating, the thickness of the myocardium, the movement of the myocardium, the ejection fraction of the heart, and can also measure pulmonary artery pressure, among other parameters. If coronary heart disease is considered, or not ruled out, coronary angiography or coronary CT can be performed. Blood tests can be done to examine cardiac enzymes, troponins, etc. There are other diagnostic tests available for heart disease, and which specific tests to conduct should be decided by a specialist based on the patient's condition.