He went to the doctor because of an irregular heartbeat.
Он пошёл к врачу из-за нерегулярного сердцебиения.
Определения
An irregular heartbeat, also known as arrhythmia, refers to a condition where the heart beats in an abnormal rhythm, which can be too fast, too slow, or erratic. This can lead to various symptoms and may require medical evaluation and treatment.
