PUBLIPHOTO DIFFUSION / SCIENCE PHOTO PUBLIPHOTO DIFFUSION / SCIENCE PHOTO
Ischaemia of heart muscle. Coloured scintigram showing inadequate blood flow (ischaemia) through the muscle of the human heart (seen in transverse section). The ischaemic areas are the blue regions at upper left and lower centre. Ischaemia of the heart muscle is usually caused by the build up of fatty deposits of atheroma inside one of the coronary arteries. Narrowing of the artery reduces the flow of blood. If the condition is severe, part of the heart's muscle may die, causing a heart attack. A scintigram is made by a special camera that detects a radioactive tracer injected into the blood. The tracer here was technetium (99mTc). See P216/200 for normal heart scintigram.
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