Table 1 Patient demographics and scan details.

DATES

05/06 to 01/10

02/10 to 04/12

Number of patients

83

91

Age (years), median (25 ^th , 75 ^th percentile)

9.8 (3.5, 17.3)

10.6 (5.6, 16.8)

0.48

Patient age < 6 years, (%)

30 (36.1)

25 (27.5)

0.22

Patient age = 6years, (%)

53 (63.9)

66 (72.5)

0.22

Male, (%)

44 (53.0)

56 (61.5)

0.26

Inpatients, (%)

4 (5.2)

5 (5.7)

0.56

Anesthesia-directed sedation, (%)

39 (47.0)

30 (33.0)

0.059

Diazepam, oral, (%)

7 (8.4)

12 (13.2)

0.32

Atropine, (%)

3 (3.6)

4 (4.4)

0.79

Prior cardiac surgery or catheter intervention, (%)

57 (68.7)

54 (59.3)

0.20

CMRI DURATION/COMPONENTS

Study duration (minutes), mean(SD)

58 ± 19

57 ± 19

0.76

Study duration (minutes), median(25 ^th , 75 ^th percentile)

57 (46, 73)

55 (42, 69)

0.50

Scan Type

Cardiac MRI only

5 (6.0)

3 (3.3)

MRA chest only

8 (9.6)

2 (2.2)

Cardiac MRI and MRA chest

39 (47.0)

44 (48.4)

Cardiac MRI with MDE and MRA chest

31 (37.4)

42 (46.2)