Table 1.
Baseline Patient Characteristics (n = 20)
| Patient Data | Echocardiography | ||
|---|---|---|---|
| Age (years) | 79.0±8.4 | Left ventricular ejection fraction | 61±6% |
| Female | 11 (55%) | Septum (mm) | 13±1 |
| Height (cm) | 166±10 | Posterior wall (mm) | 12±1 |
| Weight (kg) | 86±16 | Left ventricular end diastolic diameter (mm) | 46±11 |
| Body mass index (kg/m2) | 31±6 | Left ventricular end-systolic diameter (mm) | 30±8 |
| Body surface area (BSA) (m2) | 2.0±0.2 | Relative wall thickness | 0.6±0.4 |
| Lower pacing rate (bpm) | 61.4±3.5 | Left ventricular mass (g) | 220±66 |
| Heart rate (bpm) | 70±12 | Left ventricular mass/BSA (g/m2) | 110±27 |
| Systolic blood pressure (mmHg) | 134±14 | Left ventricular end diastolic volume (LVEDV) (mL) | 77±23 |
| Diastolic blood pressure (mmHg) | 71±9 | Left ventricular end systolic volume (mL) | 30±13 |
| Baseline QRS interval (ms) | 134±50 | LVEDV/BSA (ml/m2) | 39±11 |
| Sinus node dysfunction | 14 (70%) | Left atrial volume (ml) | 69±21 |
| AV conduction disease | 6 (30%) | Left atrial volume/BSA (ml/m2) | 34±13 |
| Right atrial appendage paced | 8 (40%) | E-wave peak velocity (cm/sec) | 92±32 |
| His/Bachmann’s bundle paced | 5 (25%) | A-wave peak velocity (cm/sec) | 88±35 |
| Right ventricular apical septum paced | 7 (35%) | Ratio of mitral peak velocity of early filling (E) to early diastolic lateral mitral annular velocity (E/e'med) | 17±8 |
| Coronary artery disease | 8 (40%) | Ratio of mitral peak velocity of early filling (E) to early diastolic lateral mitral annular velocity (E/E'lat) | 13±6 |
| Hypertension | 17 (85%) | Pulmonary arterial systolic pressure (mmHg) | 36±9 |
| Diabetes mellitus | 6 (30%) | ||
| Atrial fibrillation | 13 (65%) | ||
| Stroke | 1 (5%) | ||
| Beta-blocker | 12 (60%) | ||
| ACE-inhibitor/Angiotensin Receptor Blocker | 12 (60%) | ||
| Diuretic | 7 (35%) | ||
| Anticoagulant | 8 (40%) | ||
| Calcium channel blocker | 5 (25%) |