An ECG or electrocardiogram is useful in measuring the electrical activity of the heart. This basic test result is helpful in assessing heart symptoms such as chest pain, breathing problems, suspected heart attack and fainting (syncope). ECG procedure is in clinical use for a long time and is very safe non invasive procedure.
A 2D echocardiogram is a cardiac imaging test using ultrasound. The images of 2D echo are extremely beneficial in viewing the chambers of heart, valves, and major blood vessels to identify if there are any abnormalities. Some of the measurements taken in 2D echo are size of the chambers, pumping function, thickness of the walls, tumors or clots (if any), pressure on the lungs, and birth defect in the heart.
Treadmill test also known as cardiac stress test is useful in understanding the ability of heart to respond to external stress/ exertion in a controlled clinical environment. The ECG measurements taken at maximum exertion are compared with at rest measurements to assess indirectly for the possibility of narrowed coronary arteries. The treadmill test is useful in patients with suspected coronary artery disease and also for assessing exercise-induced irregularity in heart beat. The treadmill test is generally safe in expert supervision.
Angiogram is used as an invasive imaging technique to view the blockages in the blood vessels (called as coronary arteries) on the surface of the heart. It is usually a day care procedure performed in the cath lab using a narrow tube called as catheter. An angiogram is helpful in the assessment of chest pains, angina and suspected heart attacks.