Diastolic heart failure is a condition in which the pumping chambers (ventricles) of the heart become thickened, grow stiff and cannot relax enough to adequately fill the heart’s lower chambers (ventricles) with blood. The fluid then backs up into organs and causes swelling (edema) (especially in feet and ankles) and congestion even though the heart's pumping function (ejection fraction) is normal. This type of heart failure is caused by conditions such as acute ischemia, systolic hypertension with enlargement of the left ventricular muscle, restrictive cardiomyopathy and hypertrophic cardiomyopathy
Aland R. Fernandez, MD
- internal medicine
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- What is diastolic heart failure?
What is a resting radionuclide angiogram (RNA)?
Brigham and Women's Hospital answeredA resting radionuclide angiogram (RNA) is a type of nuclear medicine procedure. This means that a tiny amount of a radioactive substance, called a radionuclide (radiopharmaceutical or radioactive tracer), is used during the procedure to assist in the examination of the tissue under study. Specifically, resting RNA evaluates the heart's chambers in motion.
A radionuclide (usually technetium) will be injected into an arm vein to "tag" the blood cells so their progress through the heart can be traced with a scanner. A special camera (gamma camera) will make recordings of the heart wall at work, like a motion picture. These recordings will be synchronized with the heartbeat by using the electrocardiogram (ECG, or recording of the heart's electrical activity).
A cardiologist (a physician who specializes in heart disease) trained in nuclear cardiology will study the films to evaluate the heart's pumping function and ejection fraction (the volume of blood pumped out with each heartbeat).
How does the heart supply itself with blood?
Mehmet Oz, MD, Cardiology, answeredThe heart gets its own supply of blood from the coronary arteries. The two main coronary arteries (right and left) and their branches supply blood throughout the heart muscle. This animation explains how these arteries transport blood.
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