While your heart pumps blood to the rest of your body, a network of arteries known as coronary arteries brings blood to your heart muscle. If these get too narrow, it can be hard for your heart to get ...

Patients with an intermediate 50% to 70% stenosed coronary lesion found on CT angiography (CTA); CT perfusion may be able to determine whether the lesion needs to be treated. Patients about to undergo ...

To detect in-stent restenosis among patients with coronary stents, a new study shows the potential for improved diagnostic accuracy by adding computed tomography perfusion imaging to coronary CT ...

How Does a VQ Scan Work? The VQ scan is a nuclear scan. It measures airflow, called ventilation, and blood flow, called perfusion, in your lungs. The V and Q make up a math equation that helps doctors ...

Background: Cardiac syndrome X is defined by a typical angina pectoris with normal or near normal (stenosis <40%) coronary angiogram with or without electrocardiogram (ECG) change or atypical angina ...

A new radioactive tracer for positron emission tomography (PET) myocardial perfusion imaging will soon be available in the United States, and it’s expected to facilitate substantial growth in such ...

The nuclear stress test can show how blood flows through your heart muscles. This reveals how well the heart pumps blood and areas of your heart muscles that do not get enough blood. Nuclear stress is ...

NO SINGLE NONINVASIVE TEST for pulmonary embolism is both sensitive and specific. Some tests are good for “ruling in” pulmonary embolism (e.g., helical CT) and some tests are good for “ruling out” ...