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Table 1 Clinical characteristics, MPI data, and angiographic results of the patient populations

From: QCard-NM: Developing a semiautomatic segmentation method for quantitative analysis of the right ventricle in non-gated myocardial perfusion SPECT imaging

Characteristics

SPECT/CT dataset

Supine/Prone dataset

SPECT/Angio dataset

Normalcy dataset

Number

24

20

60

20

Age (years)

56.5 ± 8.6 (41–69)

60.9 ± 10.9 (37–83)

61.9 ± 10.1 (36–90)

56.7 ± 11.5 (39–80)

Male sex

9 (37%)

14 (70%)

32 (53%)

7 (35%)

Risk factors

Obesity

5 (21%)

4 (20%)

18 (30%)

3 (15%)

Diabetes mellitus

7 (29%)

4 (20%)

21 (35%)

0

Hypertension

13 (54%)

9 (45%)

44 (73%)

0

Hyperlipidemia

8 (33%)

6 (30%)

23 (38%)

0

CKD

1 (4%)

0 (0%)

1 (2%)

0

Current smoker

5 (21%)

3 (15%)

16 (27%)

0

Family history

3 (12%)

2 (10%)

15 (25%)

4 (20%)

Stress protocol

Dipyridamole stress protocol

24 (100%)

20 (100%)

58 (97%)

20 (100%)

Dobutamine stress protocol

0

0

2 (2%)

0

Maximum heart rate

88.2 ± 10.2 (71–103)

84.7 ± 15.2 (62–115)

94.5 ± 14.4 (65–133)

99.25 ± 15.3 (82–131)

Interpretation of MPI throughout the LV myocardium

Negative for appreciable ischemia

7 (29%)

13 (65%)

24 (30%)

20 (100%)

Mild-to-moderate ischemia

11 (46%)

6 (30%)

25 (31%)

0

Severe ischemia

6 (25%)

1 (5%)

28 (35%)

0

MI; MI + ischemia

0

0

3; 3 (7%)

0

Normal function

21 (87%)

18 (90%)

46 (57%)

0

Stress EDV (ml)

84.3 ± 21.6 (28–215)

105 ± 36.9 (48–204)

78.1 ± 38.5 (22–224)

76.2 ± 13.14 (62–99)

Stress ESV (ml)

34.1 ± 8.1 (9–48)

37.7 ± 21.8 (6–90)

32.7 ± 26.2 (6–138)

24.25 ± 7.49 (13–73)

Stress EF (ml)

63.2 ± 4.9 (23–85)

65.4 ± 8.9 (46–75)

56.9 ± 23.0 (4–85)

68.6 ± 6.2 (61–79)

Angiographic results (N = 60)

Normal

7 (12%)

RCA > LAD, LCX

11 (18%)

3VD

17 (28%)

LAD, LCX > RCA

25 (42%)

  1. Values are presented as mean ± SD (range) or N (%) as appropriate
  2. CKD Chronic kidney disease, EDV End-diastolic volume, ESV End-systolic volume, EF Ejection fraction, LV Left ventricular, MPI Myocardial perfusion imaging, MI Myocardial infarction, LAD Left ascending coronary, LCX Left circumference coronary, RCA Right coronary artery, 3VD Three-vessel diseases