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Table 2 Patients’ SPECT and echocardiography data (n = 28 patients with successful CTO recanalization)

From: Prompt and consistent improvement of coronary flow velocity reserve following successful recanalization of the coronary chronic total occlusion in patients with viable myocardium

SPECT MPI

LVEF (mean ± SD)

57 ± 10%

SRS (median, IQR)

5 (1–12)

Perfusion abnormality (median, IQR)

8.5 (1.5–19.5)

Stress echocardiography

Test result

• Positive (n, %)

18 (64.3%)

• Negative

10 (35.7%)

Ischemic myocardial segments (median, IQR)

2 (0–3)

Chest pain during the test (n, %)

7 (25%)

WMSI at rest

1.139 ± 0.166

WMSI at peak stress

1.301 ± 0.275

LVEF at rest (%)

55.9 ± 9.7

LVEF at peak stress (%)

53.1 ± 11.1

Heart rate recovery (bpm, mean ± SD)

36.8 ± 10.2

Duke score (median, IQR)

2.0 (− 1.5 to 3.5)

  1. LVEF left ventricle ejection fraction, SD standard deviation, SRS summed rest score, IQR interquartile range, WMSI wall motion score index, LVEF left ventricle ejection fraction, bpm beats per minute