2022年10月8日 · A normal resting heart rate for adults ranges from 60 to 100 beats per minute. Generally, a lower heart rate at rest implies more efficient heart function and better cardiovascular fitness. For example, a well-trained athlete might have a normal resting heart rate closer to 40 beats per minute.

2023年10月13日 · A heart arrhythmia (uh-RITH-me-uh) is an irregular heartbeat. A heart arrhythmia occurs when the electrical signals that tell the heart to beat don't work properly. The heart may beat too fast or too slow. Or the pattern of the heartbeat may be inconsistent. A heart arrhythmia may feel like a fluttering, pounding or racing heartbeat.

2024年4月16日 · A pulse is the heart rate. It's the number of times the heart beats in one minute. The pulse can be measured using the radial artery in the wrist or the carotid artery in the neck. Heart rates vary from person to person. Knowing your …

2022年6月3日 · Growth is rapid this week. Just four weeks after conception, the neural tube along your baby's back is closing. The baby's brain and spinal cord will develop from the neural tube. The heart and other organs also are starting to form. Structures necessary to the formation of the eyes and ears develop. Small buds appear that will soon become arms.

2022年5月27日 · A heart structure problem present before birth (congenital heart defect) causes irregular blood flow between the heart chambers or blood vessels. In adults, worrisome heart murmurs are usually due to heart valve problems that develop later in life (acquired heart valve disease). Things that can damage the heart valves include: Calcium deposits.

2023年10月13日 · A pacemaker helps the heart keep a steady beat. If the device finds a slow heartbeat, it sends electrical signals to correct the beat. A dual chamber pacemaker checks, or paces, the heart signals in the right upper and lower heart chambers. A biventricular pacemaker paces both lower heart chambers.

2023年12月15日 · In a healthy heart, this signaling process usually goes smoothly. The resting heart rate is typically 60 to 100 beats a minute. But in tachycardia, something causes the heart to beat faster than 100 beats a minute. Risk factors. In general, things that may raise the risk of irregular heart rhythms that commonly cause tachycardia include ...

This causes the heart to beat too fast. Then the heart is not able to fill with blood properly. Risk factors. Anyone can get atrial tachycardia. But some health conditions or treatments can increase your risk. Atrial tachycardia risk factors include: Heart conditions such as coronary artery disease, heart valve disease and other heart diseases.

2024年8月13日 · Heart disease symptoms caused by irregular heartbeats, called arrhythmias. The heart may beat too quickly, too slowly or irregularly. Heart arrhythmia symptoms can include: Chest pain or discomfort. Dizziness. Fainting or almost fainting. Fluttering in the chest. Lightheadedness. Racing heartbeat. Shortness of breath. Slow heartbeat.

2022年4月30日 · The contractions usually beat sooner than the next expected heartbeat. The cause of premature ventricular contractions isn't always clear. Certain things including heart diseases or changes in the body can make cells in the lower heart chambers electrically unstable. Heart disease or scarring may cause the heart's signals to be misrouted.