How the Heart Works - What the Heart Looks Like - NHLBI, NIH
网页2022年3月24日 · The heart is made of three layers of tissue. Endocardium is the thin inner lining of the heart chambers and also forms the surface of the valves. Myocardium is the thick middle layer of muscle that allows your heart chambers to contract and relax to pump blood to your body. Pericardium is the sac that surrounds your heart.
Cardiomyopathy - What Is Cardiomyopathy? - NHLBI, NIH
网页2022年4月19日 · Español. Cardiomyopathy refers to problems with your heart muscle that can make it harder for your heart to pump blood. There are many types and causes of cardiomyopathy, and it can affect people of all ages. Depending on the type of cardiomyopathy that you have, your heart muscle may …
Physical Activity and Your Heart - Benefits | NHLBI, NIH
网页2022年3月24日 · Physical activity strengthens your heart and improves lung function. When done regularly, moderate- and vigorous-intensity physical activity strengthens your heart muscle. This improves your heart's ability to pump blood to your lungs and throughout your body. As a result, more blood flows to your muscles, and oxygen levels in your blood rise.
How the Heart Works - The Heart - NHLBI, NIH
网页2022年3月24日 · Español. The heart is an organ about the size of your fist that pumps blood through your body. It is made up of multiple layers of tissue. Your heart is at the center of your circulatory system. This system is a network of blood vessels, such as arteries, veins, and capillaries, that carries blood to and from all areas of your body.
Heart Attack - What Is a Heart Attack? - NHLBI, NIH
网页2022年3月24日 · A heart attack, also known as a myocardial infarction, happens when the flow of blood that brings oxygen to a part of your heart muscle suddenly becomes blocked. Your heart can’t get enough oxygen. If blood flow is not restored quickly, the heart muscle will begin to die. Heart attacks are very common. According to the Centers for Disease ...
Study: Extra fat around the heart is associated with an increased …
网页2021年6月3日 · After prospectively following more than 6,000 adults, ages 45-84, for about 15 years, researchers found that extra fat around the heart, called pericardial fat, was associated with an increased risk for heart failure. The association was stronger for heart failure with preserved ejection fraction, which results from the heart muscle becoming stiff.
Heart Failure - What Is Heart Failure? - NHLBI, NIH
网页2022年3月24日 · What Is Heart Failure? Heart failure, also known as congestive heart failure, is a condition that develops when your heart doesn’t pump enough blood for your body’s needs. This can happen if your heart can’t fill up with enough blood. It can also happen when your heart is too weak to pump properly. …
How the Heart Works - How the Heart Beats - NHLBI, NIH
网页2022年3月24日 · At rest, a heart rate of 60 to 100 beats per minute is normal. When you exercise, your heart beats faster, and your heart rate speeds up to get more oxygen to your muscles. Signals from your body’s nervous system and hormones from your endocrine system control how fast and hard your heart beats. These …
Cardiomyopathy - Types | NHLBI, NIH
网页2022年3月24日 · Hypertrophic cardiomyopathy. Dilated cardiomyopathy. Arrhythmogenic cardiomyopathy. Restrictive cardiomyopathy. Left ventricular noncompaction. Takotsubo cardiomyopathy, or broken heart syndrome. There are many types of cardiomyopathy; which kind you have depends on the problem with your heart.
Angina (Chest Pain) - Causes and Risk Factors | NHLBI, NIH
网页2023年7月10日 · Cardiomyopathy, or disease of the heart muscle; Heart problems, such as heart failure, heart valve diseases, or high blood pressure; inflammation Metabolic syndrome; Medical procedures. Heart procedures such as stent placement, percutaneous coronary intervention (PCI), or coronary artery bypass …