Table 2.
CS and LA Blood Measurements
| Controls | HFpEF | |||||||
|---|---|---|---|---|---|---|---|---|
| No. | Baseline | 125 bpm | P Value | No. | Baseline | 125 bpm | P Value | |
| Oxygen saturation | 9 | 78±12 | 77±11 | ns | 9 | 74±9 | 75±9 | ns |
| CS flow, mL/min | 6 | 248±68 | 452±169 | 0.01 | 9 | 294±152 | 523±179 | 0.002 |
| MVO2, mL/min | 6 | 12±3 | 18±6 | 0.005 | 7 | 19±16 | 28±17 | 0.01 |
| MVO2, mL/min per 100 g | 6 | 7±3 | 11±5 | 0.01 | 7 | 10±8 | 14±9 | 0.01 |
| pH | 9 | 7.33±0.05 | 7.31±0.04 | ns | 9 | 7.30±0.03 | 7.31±0.03 | ns |
Baseline vs 125 beats per minute (bpm): Control patients’ coronary sinus (CS) blood sample measurements compared with those of patients with heart failure with preserved ejection fraction (HFpEF) at baseline heart rate and at paced heart rate of 125 bpm. LA indicates left atrial; MVO2, myocardial oxygen consumption; and ns, nonsignificant.