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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