Abstract:

Objective   To distinguish two mechanisms of resting myocardial ischemia-coronary artery spasm and the other causes, determine the incidence of each mechanism in different coronary atherosclerosis(AS)populations with heart remote monitoring system. Methods   Enrolled all the patients who underwent the coronary arteriography or Computed Tomography of coronary arteriography(CTA), as well as Holter or iHolter, in the heart remote monitoring center from January 2009 to December 2010. Reviewed all the patients' records and reports of the Holter and iHolter , and performed all analyses with the statistical software program SPSS version 16.0. Results   The incidence of resting myocardial ischemia was more than 21.3% in the patients diagnosed with coronary artery disease by the coronary arteriography or CTA, while the incidence was more than 58.3%(P<0.05) in the patients only showed mild stenosis in CTA or with negative coronary arteriography. Analyzing the etiologies of the resting myocardial ischemia, coronary artery spasm accounted for more than 73.3%, while the other causes only accounted for less than 26.7%(P<0.05). Conclusions   The coronary arteriography can be used to distinguish the two mechanisms of the resting myocardial ischemia. And the coronary artery spasm is the chief mechanism of resting myocardial ischemia. The resting myocardial ischemia can easily happen in the patients only showed mild stenosis in CTA or with negative coronary arteriography.It is very important to monitor resting myocardial ischemia with the heart remote monitoring system.

Key words: Heart remote monitoring techniques; Resting myocardial ischemia; Coronary artery spasm