MB and cardiac arrhythmia: Other parameters of myocardial injury, such as troponin I, creatine phosphokinase of muscle band (CPK-MB) and myoglobin, are significantly lower, because of the short duration of the temporary occlusion.[14–19] To reduce the myocardial ischemia, it is imperative to improve myocardial oxygen balance by reducing the oxygen consumption through a decrease in heart rate and contractility, as well as through decrease in the occurrence of arrhythmias.