Chinese Medicine Shensongyangxin Is Effective for Patients with Bradycardia: Results of a Randomized, Double-Blind, Placebo-Controlled Multicenter Trial

Table 1

Basic characteristics of study population.

Groups	Trial group (𝑛=115)	Control group (𝑛=104)
Gender M/F (𝑛)	60/55	47/57
Height (cm)	165.68±7.85	165.15±7.71
Weight (kg)	66.69±10.24	65.35±9.99
Systolic blood pressure (mmHg)	126.64±13.64	128.26±13.70
Diastolic blood pressure (mmHg)	77.84±7.71	76.51±8.33
Heart rate (bpm)	54.09±5.87	53.13±5.79
QT interval (ms)	430.42±35.85	437.07±34.32
Left ventricular ejection fraction (%)	65.88±6.68	65.28±8.04
Left ventricular end diastolic dimension (mm)	49.70±6.50	48.63±5.57
NYHA class, 𝑛 (%)
I	95 (82.6)	86 (82.7)
II	20 (17.4)	18 (17.3)
Hypertension, 𝑛 (%)	37 (32.2)	32 (30.8)
Ischemic heart disease, 𝑛 (%)	32 (27.8)	39 (37.5)
Diabetes mellitus 𝑛 (%)	6 (5.2)	7 (6.7)
History of bradycardia 𝑛 (%)	13 (11.3)	7 (6.7)
Types of bradycardia (%)
Sinus bradycardia, sinus pauses	64 (55.7)	65 (62.5)
Atrioventricular block	11 (9.6)	8 (7.7)
Bradycardia-tachycardia syndrome	40 (34.8)	31 (29.8)