Fetal heart sound

Bell pendulum rhythm: Also known as fetal heart rhythm, fetal heart-like heart sounds. The patient took a supine position, and Fu Yitun was auscultated in the apical region. If the first heart sound lost its inherent low-blunt tone, and was similar to the second heart sound, and the heart rate tachycardia occurred continuously, like a pendulum's "tick" "The sound is called the pendulum rhythm. If it is accompanied by tachycardia and the heart rate is above 120 beats per minute, the person who resembles the fetal heart sound is called fetal heart rhythm.