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Table 1 Baseline characteristics (n = 161)

From: Local electrogram delay recorded from left ventricular lead at implant predicts response to cardiac resynchronization therapy: Retrospective study with 1 year follow up

Age (years)

67.0 ± 9.4 (32 – 86)

Female (%)

20.5

Ischemic cardiomyopathy (%)

53.4

NYHA functional class

3.1 ± 0.5 (2 – 4)

- NYHA II (%)

8.1

- NYHA III (%)

70.8

- NYHA IV (%)

21.1

LVEF (%)

24.7 ± 5.1 (15 – 35)

LVESD (mm)

57.1 ± 8.2 (37 – 90)

LVEDD (mm)

66.4 ± 7.6 (45 – 96)

Mitral regurgitation (grade)

1.9 ± 1.1 (1 – 4)

NT-proBNP (pg/ml)

4221 ± 5563 (270 – 35000)

Atrial fibrillation (%)

14.3

ICD (%)

67.1

QRSd (ms)

157 ± 20 (120 – 211)

QLV (ms)

117 ± 28 (65 – 189)

QLV ratio

0.74 ± 0.12 (0.46 – 0.95)

Baseline medication

 

- Beta-blockers (%)

96

- ACEI or ARB (%)

99

- Loop diuretics (%)

91

- Aldosterone antagonists (%)

89

  1. The values are mean ± standard deviation (range) or proportions. NYHA = New York Heart Association; LVEF = left ventricular ejection fraction; LVESD = left ventricular end-systolic diameter; LVEDD = left ventricular end-diastolic diameter; NT-proBNP = N-terminal prohormone of brain natriuretic peptide; QRSd = QRS complex duration; QLV = left ventricular electrode local electrogram delay from the beginning of QRS; QLV ratio was calculated as QLV/QRSd; ICD = implantable cardioverter-defibrillator; ACEI = angiotensin-converting enzyme inhibitor; ARB = angiotensin receptor blocker.