How the Heart Works - How Blood Flows through the Heart
2022年3月24日 · Some conditions can affect normal blood flow through these heart arteries. Examples include: Angina; Heart attack; Coronary heart disease; The coronary veins return oxygen-low blood from the heart's muscles back to the right atrium so it can be pumped to the lungs. They include: The anterior cardiac veins; The great cardiac vein; The middle ...
Coronary Heart Disease - Causes and Risk Factors - NHLBI, NIH
2023年12月20日 · This can lower or block blood flow to the heart muscle, preventing the heart from getting enough oxygen-rich blood. This is the main cause of obstructive coronary artery disease. Normal versus a blocked artery. The large image on the left shows the location of the coronary arteries in the heart.
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.
Atherosclerosis - What Is Atherosclerosis? | NHLBI, NIH
2024年10月28日 · Normal artery and an artery narrowed by plaque buildup. Atherosclerosis can affect almost any artery in the body, including ones in the heart, brain, arms, legs, pelvis, and kidneys. Atherosclerosis has a different name depending on the arteries that are affected: Carotid artery disease is plaque buildup in the neck arteries. It reduces blood ...
Atherosclerosis - Diagnosis - NHLBI, NIH
2024年10月28日 · Coronary calcium scans measure the amount of calcium in the walls of your coronary arteries using a CT scanner. Buildup of calcium is a sign of atherosclerosis. The results are given as a score based on the amount of calcium in your coronary arteries. A …
Heart Tests - Heart Tests - NHLBI, NIH
2022年3月24日 · A coronary calcium scan will determine a score that reflects the amount of calcium found in your coronary arteries, often referred to as an Agatston score. A score of 0 is normal. In general, the higher your score, the more likely you are to have coronary heart disease. If your score is high, your doctor may recommend more tests.
Heart Treatments - Heart Treatments - NHLBI, NIH
2022年3月24日 · Percutaneous coronary intervention. Percutaneous coronary intervention (PCI), also called coronary angioplasty, is a nonsurgical but invasive procedure that improves blood flow to our heart. Doctors use PCI to open blood vessels to the heart that are narrowed or blocked by plaque buildup. It is commonly used to open a blocked artery in patients ...
Stents - Getting a Stent | NHLBI, NIH
2023年11月30日 · Placing a stent in a narrowed coronary artery. The coronary arteries surround the heart and provide oxygen-rich blood to the heart muscle. To place a stent in a coronary artery narrowed by plaque, a catheter is inserted with an empty balloon and a stent attached at the end. The balloon is inflated to push the artery open and open the stent.
Heart Attack - Causes and Risk Factors - NHLBI, NIH
2022年3月24日 · Smoking is a risk factor for a coronary spasm. If you smoke, you may be more likely to have a spasm triggered by extreme cold or very stressful situations. Drugs like cocaine may also cause coronary spasm. A coronary artery embolism occurs when a blood clot travels through your bloodstream and gets stuck in your coronary artery. This can block ...
Another term for it is coronary artery disease. About 366,000 Americans . die from coronary heart disease each year. Coronary heart disease occurs when plaque (a combination of fat, cholesterol, calcium, and other substances found in the blood) builds up in your arteries. You may have heard this called clogged arteries or atherosclerosis.