临床上交替脉是心脏重度衰竭的征象。实验研究常用心脏快速起搏诱发交替脉,并已发现,只要起搏频率足够快,正常功能的心脏亦可产生交替脉。为探 Alternating clinical pulse is a sign of severe heart failure. Experimental studies have commonly used rapid cardiac pacing to induce alternating pulses and have found that as long as pacing rates are fast enough, normal functioning hearts can also produce alternating pulses. For exploration