Research Article

Simplified Assessment of the Index of Microvascular Resistance

Table 1

Clinical and angiographic characteristics.

N, patients29
Age, years, mean ± SD68.8 ± 7.24
Gender, male, n (%)18 (62.1)
BMI, mean ± SD27.8 ± 4.31
Coronary risk factors
 Diabetes, n (%)8 (27.6)
 Dyslipidemia, n (%)23 (79.3)
 Hypertension, n (%)19 (65.5)
 Current smoking, n (%)7 (24.1)
 Prior PCI, n (%)7 (24.1)

Clinical presentation
 Stable angina class 1 (%)1 (3.45)
 Stable angina class 2 (%)5 (17.2)
 Stable angina class 3 (%)1 (3.45)
 Stable angina class 4 (%)1 (3.45)
 Unstable angina (%)1 (3.45)

Silent ischemia3 (10.3)
 Angina equivalent (%)17 (58.6)
 Creatinine clearance, ml/min, mean ± SD0.82 ± 0.13
 Ejection fraction, %, median (95% CI)60.0 (60.0, 60.0)

Medication
 ACE-I, n (%)13 (44.8)
 Beta-blocker, n (%)11 (37.9)
 Calcium channel blockers, n (%)4 (13.8)
 Statins, n (%)19 (65.5)
 Aspirin, n (%)16 (55.2)
 P2Y12 inhibitor, n (%)2 (6.9)
 Diuretic, n (%)6 (20.7)
 Radial access27 (93%)
 Femoral access2 (7%)

Angiographic characteristics
 Vessel, n (%)
  LAD16 (55.2)
  LCX7 (24.1)
  RCA6 (20.7)
  Diameter stenosis, %, median (IQR)20.0 (14.0, 32.0)
  Vessel diameter, mm, mean ± SD2.60 ± 0.5

BMI, body mass index; PCI, percutaneous coronary intervention; ACE-I, angiotensin-converting enzyme inhibitor; LAD, left anterior descending coronary artery; LCX, left circumflex coronary artery; RCA, right coronary artery.