medical instrument that records electric currents associated with contractions of the heart
a medical instrument that measures the mechanical force of cardiac contractions and the amount of blood passing through the heart during a specified period by measuring the recoil of the body as blood is pumped from the ventricles
造句
用作名詞(n.)
A cardiograph records the heartbeat. 心動描記器上標(biāo)明心跳次數(shù)。