众所周知,低血钾诱发的室性心律失常往往不易治疗。这可能和心肌细胞受到钾离子以及某些常用的抗心律失常的药物影响有关,因为低血钾、奎尼丁、普鲁卡因酰胺等因子都能延长QT间期,也就是延长了心肌复极化的易损期。因此,如果这些因子中有两个同时作用于心肌,则使易损期加倍延长,而此时常常容易发生期前收缩,如果得不到及时纠正,则导致反复心律的可能性将大大增加。故而有人认为在缺钾诱发的室性 It is well-known that hypokalemia-induced ventricular arrhythmias are often difficult to treat. This may be cardiomyocytes and potassium ions and some commonly used anti-arrhythmic drugs, because of hypokalemia, quinidine, procainamide and other factors can prolong the QT interval, which is to extend the myocardial complex Polarization of the vulnerable period. Therefore, if two of these factors act on the myocardium at the same time, then the vulnerability period is doubled and the premature contractions are often prone to occur. If not corrected in time, the likelihood of repeated heart rhythms will be greatly increased. Therefore, some people think that potassium-induced ventricular