Table 1.
Clinical Response (2D Echo End Systolic Volume [ESV] Change; New York Heart Association Functional Classification [NYHA Class]; Minnesota Living With Heart Failure Questionnaire [HF] Score; and 6‐Minute Walk Distance) for the 3 Patient Cases Within 3 Months Prior to Device Implantation (ACUTE) and After at Least 6 Months of Sustained Pacing (CHRONIC) Were Used to Classify Patients as Either Responders or Nonresponders to Cardiac Resynchronization Therapy (CRT)
| Case | Time | ESV Change | NYHA Class | HF Score | 6‐Minute Walk Distance | Responder? |
|---|---|---|---|---|---|---|
| Case 1 | ACUTE | −67% | III | 45 | Unchanged | Y |
| CHRONIC | III | 55 | ||||
| Case 2 | ACUTE | −11% | III | 36 | 280 m | Y |
| CHRONIC | I | 26 | 370 m | |||
| Case 3 | ACUTE | +36% | III | 64 | 505 m | N |
| CHRONIC | I | 4 | 546 m |