tachycardiát

Tachycardia is a medical term used to describe a heart rate that is faster than normal. For adults at rest, a heart rate exceeding 100 beats per minute is typically considered tachycardia. The normal resting heart rate for adults usually ranges between 60 and 100 beats per minute. However, this can vary depending on factors such as age, fitness level, and certain medical conditions.

There are several types of tachycardia, categorized by where the abnormal electrical activity originates in the heart. These include supraventricular tachycardias (SVT), which begin above the ventricles, and ventricular tachycardias, which originate in the ventricles. Common symptoms of tachycardia can include palpitations, a racing heart, shortness of breath, dizziness, chest pain, and fainting.

Tachycardia can be caused by a variety of factors. These include stress, anxiety, fever, dehydration, anemia, hyperthyroidism, certain medications, and illegal drug use. In some cases, underlying heart conditions, such as coronary artery disease or heart failure, can also lead to tachycardia.

Diagnosis of tachycardia typically involves a medical history, physical examination, and an electrocardiogram (ECG or EKG) to record the heart's electrical activity. Further tests, such as a Holter monitor or an event recorder, may be used to capture irregular heart rhythms over a longer period. Treatment for tachycardia depends on the specific type, its cause, and the severity of symptoms. Options may include lifestyle changes, medications to control heart rate or rhythm, or procedures like cardioversion or ablation.