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Table 2 Treadmill ESE parameters at peak stress

From: The feasibility, reliability, and incremental value of two-dimensional speckle-tracking for the detection of significant coronary stenosis after treadmill stress echocardiography

Variables

Abnormal stress echocardiogram

(n = 51)

Normal stress echocardiogram

CAD (n = 51)

p-values

Stress EKG

Maximum heart rate achieved (bpm) – mean (SD)

141.9 (16.3)

148.5 (16.1)

0.04

Percentage of maximum predicted heart rate (%) – median (IQR)

92.0 (88.0 – 99.0)

94.0 (90.0 – 101.0)

0.08

Maximum systolic blood pressure (mmHg) – mean (SD)

169.4 (27.2)

174.4 (27.4)

0.36

Abnormal blood pressure responsea – no. (%)

7 (13.7)

3 (5.9)

0.18

Positive EKG for ischemia during the stress test – no. (%)

35 (68.6)

27 (52.9)

0.11

Clinically positive stress testb – no. (%)

22 (43.1)

3 (5.9)

 < 0.0001

Maximum achieved METS – median (IQR)

7.3 (6.1 – 9.6)

10.0 (7.7 – 11.7)

 < 0.0001

Double product – mean (SD)

23,884.7 (4876.6)

26,179.9 (4705.6)

0.02

Stress echocardiography

Absence of left ventricular ejection fraction increase at peak stress – no. (%)

31 (60.8)

0 (0.0)

 < 0.0001

Wall motion score index at peak stress – median (IQR)

1.4 (1.2 – 1.5)

1.0 (1.0 – 1.0)

 < 0.0001

Predicted significant CAD in the LAD territory – no. (%)

33 (64.7)

0 (0.0)

 < 0.0001

Predicted significant CAD in the non-LAD territory – no. (%)

25 (49.0)

0 (0.0)

 < 0.0001

  1. CAD coronary artery disease, EKG electrocardiogram, IQR interquartile range, METS metabolic equivalents, SD standard deviation
  2. a Defined as the failure to reach a systolic blood pressure of 120 mmHg or to increase systolic blood pressure by more than 10 mmHg at peak stress or 3 min after the cessation of the stress test
  3. b Defined as angina or angina-like symptoms during stress treadmill stress test