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Optical coherence tomography (OCT) is a diagnostic procedure that is used during cardiac catheterization. Unlike ultrasound, which uses sound waves to produce an image of the blood vessels, OCT uses light. With OCT, doctors can obtain images of the blood vessels that are about the same as if they were looking under a microscope. The main applications of the OCT system are: 1. Atherosclerotic plaque assessment 2. Stent struts coverage and apposition assessment, and in stent restenosis evaluation 3. PCI guide and optimisation

Ambulatory Blood Pressure Monitoring (ABPM) measures your blood pressure over the course of a full day (24 hours). You will wear a blood pressure cuff on your upper arm that is connected to a monitor. The monitor records your blood pressure readings 3 times per hour while awake and 1 time per hour while sleeping. Measuring your blood pressure in your normal environment and during your usual daily routines gives your doctor a better idea of how your blood pressure changes throughout the day. Some reasons for having ABPM: 1. White coat hypertension: high blood pressure in clinic settings (around medical staff or doctors) with lower blood pressure outside of clinic. 2. High blood pressure without a diagnosis of hypertension: blood pressure may be high sometimes and more blood pressure measurements are needed. 3. Hypertension medicine assessment: to make sure your blood pressure medicines are working as they should all day. 4. Assess symptoms - such as lightheadedness, dizziness, or headaches, to check if these are due to blood pressure.

A stress test, sometimes called a treadmill test or exercise test, helps a doctor find out how well your heart handles work. As your body works harder during the test, it requires more oxygen, so the heart must pump more blood. The test can show if the blood supply is reduced in the arteries that supply the heart. It also helps doctors know the kind and level of exercise appropriate for a patient. A person taking the test is hooked up to equipment to monitor the heart, walks slowly in place on a treadmill. Then the speed is increased for a faster pace and the treadmill is tilted to produce the effect of going up a small hill. Afterwards will sit or lie down to have their heart and blood pressure checked.