Effect of single ventricular premature contractions on response to cardiac resynchronization therapy

Table 3 Changes of echocardiographic parameters 6 months after CRT implantation

Echocardiographic changes	All patients (n = 38)	Low PVCs (n = 19)	High PVCs (n = 19)	P-value
Δ LVEF (%, mean ± SD)	+ 8.8 ± 7.6	+ 9.1 ± 6.6	+ 8.6 ± 8.7	0.89
Δ LVESV (mL,mean ± SD)	− 42.7 ± 49.7	− 39.0 ± 50.4	− 46.4 ± 50.2	0.82
Δ LAV (mL, mean ± SD)	− 10.4 ± 25.4	− 19.4 ± 25.4	− 1.4 ± 22.5	0.02

Bold indicate statistically significant as in the p-value is < 0.05
The median value of single PVCs at one-month follow-up visit was 11,401 in our patient population. Patients with a lower number of PVCs than 11,401 were categorized as “low PVCs”, while patients showing more than 11,401 PVCs at the one-month follow-up visit were categorized as “high PVCs”
A total of thirty-eight patients had baseline and six-month echocardiographic data and were analyzed for echocardiographic changes (Δ)
CRT, cardiac resynchronization therapy; LAV, left atrial volume; LVEF, left ventricular ejection fraction; LVESV, left ventricular end-systolic volume; PVCs, premature ventricular contractions; SD, standard deviation

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