Table 1

Patient Characteristics

AllSingle-Source CTDual-Source CT
No HRCHRCNo HRCHRC
n20045555347
Male/female114/8617/2823/2235/1829/18
Age (yrs)63 ± 1165 ± 1165 ± 1161 ± 1163 ± 11
Weight (kg)81 ± 1580 ± 1578 ± 1584 ± 1680 ± 14
Beta-blocker medication9350/55 (90%)43/47 (92%)
Baseline heart rate (beats/min)76 ± 1377 ± 1577 ± 1374 ± 1377 ± 10
Heart rate during CT (beats/min)65 ± 1370 ± 1560 ± 869 ± 1459 ± 10
Heart rate ≤60 beats/min during CT83/200 (42%)12/45 (26%)30/55 (55%)13/53 (25%)28/47 (59%)
Scan length (mm)121 ± 14116 ± 14120 ± 13121 ± 14123 ± 14
Scan duration (s)11 ± 1.912 ± 1.212 ± 1.19.2 ± 1.910.7 ± 1.8
Radiation exposure (mSv)13.3 ± 3.013.0 ± 2.712.0 ± 2.014.5 ± 3.314.8 ± 3.5

CT = computed tomography; HRC = heart rate control.

  • Effective dose.