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| Study | N | Randomized? | Controlled? | NYHA Class* | Follow-up, Months | Results |
|---|---|---|---|---|---|---|
| InSync Italian Registry (Zardini et al., 2000) (43) |
151 | No | No Registry |
II–IV | Mean, 10 (SD, 5) | Improved QoL* (P < .0001) Improved NYHA class (P < .0001) Improved 6-min walk (P < .0001) |
NYHA indicates New York Heart Association; QoL, quality of life.
