How the Heart Works How Blood Flows through the Heart
2022年3月24日 · Your coronary arteries supply blood to your heart. These arteries branch off from the aorta so that oxygen-rich blood is delivered to your heart as well as the rest of your body. The left coronary artery delivers blood to the left side of your heart, including your left atrium and ventricle and the septum between the ventricles.
Coronary Heart Disease - Causes and Risk Factors - NHLBI, NIH
2023年12月20日 · Damage to the inner walls of the larger coronary arteries can cause them to spasm (suddenly tighten). This is called vasospasm — the spasm causes the arteries to narrow temporarily and blocks blood flow to the heart. Coronary microvascular disease in small arteries and obstructive coronary artery disease in large arteries.
What Is Coronary Heart Disease? - NHLBI, NIH
2023年12月20日 · The cause of coronary heart disease depends on the type. Coronary artery disease is often caused by cholesterol, a waxy substance that builds up inside the lining of the coronary arteries, forming plaque. This plaque buildup can partially or totally block blood flow in the large arteries of the heart.
Coronary Heart Disease - Diagnosis - NHLBI, NIH
2023年12月20日 · It can help your provider diagnose coronary microvascular disease, as well as nonobstructive or obstructive coronary artery disease. A cardiac MRI can also help explain results from other imaging tests. A cardiac positron emission tomography (PET) scan assesses blood flow through the coronary blood vessels and into the heart muscle. This type ...
What Is Coronary Artery Bypass Grafting? - NHLBI, NIH
2022年3月24日 · This creates a new route for blood to flow that bypasses the narrowed or blocked coronary arteries. The blood vessels are usually arteries from the arm or chest, or veins from the legs. In traditional “open heart” CABG, your heart is stopped, and a heart-lung bypass machine takes over the job of pumping blood throughout the body.
How Smoking Affects the Heart and Blood Vessels - NHLBI, NIH
2022年3月24日 · It can damage the heart and blood vessels of people who don’t smoke in the same ways that smoking causes damage to people who do. The image shows how smoking can affect arteries. Figure A shows the location of coronary heart disease and peripheral artery disease. Figure B shows a leg artery with plaque buildup partially blocking blood flow.
Physical Activity and Your Heart - Benefits | NHLBI, NIH
2022年3月24日 · This causes a blood clot to form on the surface of the plaque. If the clot becomes large enough, it can mostly or completely block blood flow through a coronary artery. Blocked blood flow to the heart muscle causes a heart attack. Certain traits, conditions, or habits may raise your risk for coronary heart disease.
Coronary Heart Disease - Treatment - NHLBI, NIH
2023年12月20日 · Coronary artery bypass grafting (CABG) improves blood flow to the heart by using healthy arteries from the chest wall and veins from the legs to bypass the blocked arteries. Surgeons typically use CABG to treat people who have severe coronary artery disease in multiple coronary arteries.
Atherosclerosis - What Is Atherosclerosis? | NHLBI, NIH
2024年10月28日 · It reduces blood flow to the brain. Coronary artery disease (CAD) is plaque buildup in the arteries of your heart. Peripheral artery disease (PAD) most often is plaque buildup in the arteries of the legs, but it can also build up in your arms or pelvis. Renal artery stenosis is plaque buildup in the arteries that supply blood to your kidneys.
Heart Attack - Causes and Risk Factors - NHLBI, NIH
2022年3月24日 · The blood clots can then block blood flow through your coronary arteries. The formation of small plaques is more common in women, people who smoke, and people who have other blood vessel conditions. A sudden and serious spasm (tightening) of your coronary artery can block blood flow through your artery, even if there isn’t a buildup of plaque ...