Objective To compare the relation of reverse Y shaped Lorenz plot which represent parasystole to heart rate variability and cardiovascular disease

Expand the understanding of there lationship between parasystolic rhythm and sinus rhythm. Methods In the cases of atrial and ventricular arrhythmias diagnosed by AECG

choosing the cases of atrial and ventricular premature beat

multifocal premature beat and parasystole with the number of premature beat≥100 times per 24h. To rule out the cases which suffering from both atrial( or AV junctional) and ventricular arrhythmias

or suffering from two kinds of arrhythmias in premature beat

multifocal premature beat and parasystole. According the diagnosis of AECG and Lorenz plot

divided the cases into three groups—premature beat group

multifocal premature beat group and parasystole(reverse Y shaped Lorenz plot) group

and then separated each group into atrial arrhythmias and ventricular arrhythmias.Observedand compared SDNN and the morbidity of cardiovascular disease in groups. Results A total of 191 cases were choosed

including 78 cases of premature beat

60 cases of multifocal prematurebeat and 53 cases of parasystole(reverse Y shaped Lorenz plot). The result showed that SDNN of parasystole group was significantly lower than others groups

The morbidity of MI of parasystoleand multifocal premature beat groups was significantly higher than premature group. Comparative result of ventricular arrhythmias groups:SDNN of ventricular parasystole group was significantly lower than others groups

Ventricular parasystoleand multifocal ventricular premature beat groups had a higher morbidity of MI than ventricular premature group. Comparative result of atrial arrhythmias groups:SDNN of atrial parasystole group was significantly lower than others groups. Conclusions The result prompted that parasystole represented by reverse Y shaped Lorenz plot is related to MI and the decrease of HRV

otherwise

the HRV decrease of reverse Y shaped Lorenz plot group

maybecaused by the competitive inhibition of parasystolic rhythm and sinus rhythm variability

or the parasystole is prone to occur with in specific range of sinus rhythm. While the result that the parasystolewas associated with MI morbidity rates

support the previously unstanding of parasystole relevant to pathological changes of the heart.