CK-MB is a laboratory measurement related to creatine kinase, an enzyme involved in cellular energy use. It is an “isoenzyme” (a specific form) that is found in higher concentrations in heart muscle compared with many other tissues. CK-MB is most commonly discussed in the evaluation of possible heart muscle injury, including heart attack (myocardial infarction). Today it is often used alongside, or in selected situations instead of, other cardiac blood tests such as troponin.

High-Sensitivity Troponin is a blood test that measures very small amounts of cardiac troponin. Cardiac troponin is a protein released when heart muscle cells are injured. High-Sensitivity Troponin is commonly used in emergency and hospital settings to evaluate possible heart attacks. It is also used to help assess risk and illness severity in some heart and non-heart conditions.

Troponin is a protein found inside heart muscle cells. It helps control how the heart muscle contracts. In medicine, Troponin most often refers to a blood test that looks for heart muscle injury. It is commonly used when clinicians evaluate chest pain or possible heart attack.

ABPM stands for ambulatory blood pressure monitoring. It is a way to measure blood pressure repeatedly over a full day and night while you go about usual activities. A small monitor connects to a blood pressure cuff worn on the upper arm. It is commonly used in cardiology and primary care to evaluate suspected or treated hypertension.

Ambulatory Blood Pressure Monitoring is a way to measure blood pressure repeatedly over a full day and night while you go about normal activities. A small monitor connects to an arm cuff and records readings automatically at set intervals. It is commonly used in cardiology and primary care to clarify whether blood pressure is truly high, low, or variable outside the clinic. It can also help evaluate nighttime blood pressure patterns that a single office reading cannot capture.

Blood Pressure Monitoring is the measurement of pressure inside the arteries as blood circulates. It is commonly done with an arm cuff in clinics, hospitals, and at home. It can also be measured continuously in selected hospital settings. The goal is to understand how blood pressure behaves over time, not just at one moment.

Vascular Ultrasound is an imaging test that uses sound waves to look at blood vessels and blood flow. It is commonly used to evaluate arteries and veins in the neck, abdomen, arms, and legs. It can help clinicians detect narrowing, blockage, clots, or abnormal flow patterns. It is usually performed in an outpatient clinic, hospital ultrasound lab, or vascular lab.

MRA most commonly means **magnetic resonance angiography**, a type of MRI focused on blood vessels. It creates pictures of arteries and veins to look for narrowing, blockages, bulges, or abnormal connections. MRA is commonly used in cardiology, vascular medicine, neurology, and radiology. In some cardiology contexts, “MRA” can also mean **mineralocorticoid receptor antagonist** (a heart failure medication class), but this article focuses on **magnetic resonance angiography**.

MR Angiography is a type of MRI scan that focuses on blood vessels. It creates detailed pictures of arteries (and sometimes veins) without using X-rays. It is commonly used to evaluate blood flow and vessel anatomy in the heart, chest, brain/neck, abdomen, and legs. Clinicians use it to help identify narrowing, blockages, aneurysms, and other vascular conditions.

CTA stands for computed tomography angiography. It is a CT scan technique that creates detailed pictures of blood vessels using X-rays and an injected contrast dye. CTA is commonly used to evaluate arteries and veins in the heart, chest, brain, abdomen, and legs. In cardiovascular care, it is often used to look for narrowing, blockages, aneurysms, or tears in blood vessels.

CT Angiography is a CT scan designed to show blood vessels after contrast dye is injected into a vein. It creates detailed pictures of arteries and veins throughout the body, including the heart and major vessels. Clinicians use it to look for narrowing, blockage, aneurysm, or abnormal vessel anatomy. It is commonly used in emergency and outpatient cardiovascular evaluation.

PVR most commonly means **pulmonary valve replacement**. It is a treatment that replaces a diseased or leaky **pulmonary valve**, which sits between the right ventricle and the pulmonary artery. PVR is often used in people with **congenital heart disease** (heart conditions present from birth). It can be done with **surgery** or with a **catheter-based** (minimally invasive) approach in selected patients.

Pulse Volume Recording is a noninvasive vascular test that measures how blood volume in an arm or leg changes with each heartbeat. It is commonly used to evaluate blood flow in the arteries of the limbs. Clinicians often use it when peripheral artery disease is suspected or needs follow-up. It is usually performed in a vascular lab or cardiology-related testing area.

Transcranial Doppler is an ultrasound test that measures blood flow in the brain’s major arteries. It uses sound waves to estimate how fast blood is moving through specific intracranial vessels. It is commonly used in stroke and neurocritical care, and sometimes in cardiovascular care when emboli or shunts are suspected. It is noninvasive and typically performed at the bedside or in an outpatient lab.

Carotid Duplex is an ultrasound test used to evaluate the carotid arteries in the neck. It combines structural imaging and blood-flow measurement in one exam. Clinicians use it to look for narrowing (stenosis) or blockage that could affect brain blood supply. It is commonly performed in vascular labs, cardiology practices, and hospital imaging departments.

Venous Doppler is an ultrasound test that evaluates blood flow in veins. It uses sound waves to show whether venous blood is moving normally or is blocked or reversed. It is commonly used to check for blood clots in the legs or arms and to assess chronic venous disease. It is also used in cardiovascular and hospital settings to evaluate central veins and venous access sites.

Duplex Ultrasound is a noninvasive imaging test that evaluates blood vessels and blood flow. It combines standard ultrasound pictures with Doppler measurements of moving blood. Clinicians commonly use it to assess arteries and veins in the neck, arms, abdomen, and legs. It is widely used in cardiovascular and vascular care to clarify symptoms and guide next steps.

TBI most commonly means **toe-brachial index** in cardiovascular medicine. It is a **ratio** comparing blood pressure at the toe to blood pressure in the arm. Clinicians use TBI to help evaluate **circulation in the legs and feet**, especially for peripheral artery disease. It is often discussed alongside the ankle-brachial index (ABI), particularly when ABI may be less reliable.

Toe-Brachial Index is a blood pressure ratio comparing the toe pressure to the arm (brachial) pressure. It is used to estimate blood flow to the lower leg and foot in a simple, noninvasive way. It is commonly used when peripheral artery disease is suspected, especially in people where ankle testing can be less reliable. Clinicians use it in vascular medicine, cardiology, podiatry, wound care, and limb-preservation settings.

ABI stands for ankle-brachial index. It is a simple comparison of blood pressure in the ankle and the arm. It helps clinicians evaluate blood flow to the legs. ABI is commonly used in cardiovascular and vascular medicine to screen for peripheral artery disease.