
Bradycardia - Symptoms and causes - Mayo Clinic
2024年12月13日 · Bradycardia (brad-e-KAHR-dee-uh) is a slow heart rate. The hearts of adults at rest usually beat between 60 and 100 times a minute. If you have bradycardia, your heart beats fewer than 60 times a minute. Bradycardia can be a serious problem if the heart rate is very slow and the heart can't pump enough oxygen-rich blood to the body. If this happens, you may feel dizzy, very tired or weak, and ...
Heart rate: What's normal? - Mayo Clinic
2022年10月8日 · A normal resting heart rate for adults ranges from 60 to 100 beats per minute. A heart rate above or below that may signal a problem.
Mayo Clinic corrected QT interval (QTc) calculator - Medical ...
Worried about QT interval prolongation? This online evidence based resource will help guide you how to measure the QT interval and calculate the QTc value with an easy to use calculator which takes into account the patients underlying rhythm, gender and age.
Bradicardia - Síntomas y causas - Mayo Clinic
2024年12月13日 · Infórmate más sobre los síntomas, el diagnóstico y el tratamiento de un latido del corazón más lento de lo habitual.
Exercise intensity: How to measure it - Mayo Clinic
2023年8月25日 · To get the most out of exercising, aim for moderate to vigorous exercise intensity. See how to judge your exercise intensity.
Frecuencia cardíaca: ¿cuál es la normal? - Mayo Clinic
2022年10月8日 · Una frecuencia cardíaca en reposo normal para los adultos oscila entre 60 y 100 latidos por minuto. Una frecuencia cardíaca por encima o por debajo puede indicar un problema.
心率:什么情况才算正常? - 妙佑医疗国际 - Mayo Clinic
2022年10月8日 · 妙佑医疗国际的亚利桑那州、佛罗里达州和明尼苏达州以及妙佑区域医疗系统地点均接受约诊。 成人正常静息心率为每分钟 60-100 次。 一般而言,静息时较低的心率意味着更有效的心脏功能和更好的心血管适应性。例如,一位 ...
Heart arrhythmia - Symptoms and causes - Mayo Clinic
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. Some heart arrhythmias are harmless. Others may cause life ...
Tachycardia - Symptoms and causes - Mayo Clinic
2023年12月15日 · Tachycardia (tak-ih-KAHR-dee-uh) is the medical term for a heart rate over 100 beats a minute. Many types of irregular heart rhythms, called arrhythmias, can cause tachycardia. A fast heart rate isn't always a concern. For instance, the heart rate usually rises during exercise or as a response to stress.
Sick sinus syndrome - Symptoms & causes - Mayo Clinic
2022年4月30日 · Sick sinus syndrome is a type of heart rhythm disorder. It affects the heart's natural pacemaker (sinus node), which controls the heartbeat. Sick sinus syndrome causes slow heartbeats, pauses (long periods between heartbeats) or irregular heartbeats (arrhythmias). Sick sinus syndrome is relatively uncommon. The risk of developing it increases with age. Many people with sick sinus syndrome ...