Table 2.
Conventional echocardiography results for 8 dogs preoperatively, 1 month, and 3 months postoperatively.
| Parameters | Unit | Baseline | Postoperative | |
|---|---|---|---|---|
| 1 month | 3 months | |||
| BW | kg | 4.23 (3.67–5.22) | 3.70 (3.29–4.83)* | 3.83 (3.28–4.93) |
| HR | beats/min | 132 (127–167) | 120 (114–130)* | 111 (102–129)* |
| LVIDd | mm | 29.5 (23.6–36.2) | 18.8 (17.9–20.8)** | 21.2 (17.2–23.8)** |
| LVIDDN | 2.03 (1.70–2.33) | 1.30 (1.26–1.39)** | 1.35 (1.15–1.60)** | |
| LA/Ao | 2.00 (1.72–2.44) | 1.34 (1.17–1.45)* | 1.36 (1.16–1.49)* | |
| FS% | % | 56.2 (50.1–60.6) | 30.5 (28.6–33.0)* | 35.3 (28.7–44.9)* |
| Mitral E velocity | cm/s | 112.9 (81.8–127.4) | 75.7 (70.4–85.6) | 74.7 (68.6–87.6) |
| Mitral A velocity | cm/s | 84.7 (81.0–92.1) | 104.1 (93.3–111.6) | 106.9 (100.3–109.2)* |
| E/A | 1.08 (0.96–1.59) | 0.79 (0.61–0.92) | 0.68 (0.63–0.84)* | |
| E′ sep | cm/s | 7.9 (6.4–8.7) | 3.9 (2.9–4.7)** | 4.4 (3.6–4.9)** |
| E′ lat | cm/s | 8.8 (7.5–9.1) | 4.4 (3.6–4.7)* | 4.1 (3.8–4.9)* |
| E/E′ sep | 14.8 (11.8–18.9) | 19.4 (17.7–28.0)* | 17.9 (16.5–19.2) | |
| E/E′ lat | 12.2 (10.3–15.6) | 19.0 (15.3–19.5) | 16.6 (13.6–19.5) | |
| MR velocity | m/s | 5.7 (5.5–6.0) | Trivial | Trivial |
| LV sphericity index | 1.25 (1.01–1.32) | 1.34 (1.30–1.65)** | 1.46 (1.32–1.53)** | |
| RV S′ | cm/s | 14.9 (13.8–18.1) | 10.3 (8.4–11.2) | 10.2 (10.0–11.7) |
Data are expressed as medians (interquartile ranges). Asterisk (*) is used to compare the significance between values of preoperative and postoperative observations (*, ** indicates p < 0.05, 0.01, respectively). LVIDd, left ventricular internal dimension in diastole; LVIDDN, normalized left ventricular internal dimension in diastole; LA/Ao, the ratio of the left atrial dimension to the aortic annulus dimension; FS, fractional shortening; E velocity, early diastolic mitral inflow velocity; A velocity, late diastolic mitral inflow velocity; E/A, the ratio of peak velocity of early diastolic transmitral flow to peak velocity of late diastolic transmitral flow; E′, early diastolic wave signal as measured by tissue Doppler imaging; sep, mitral annulus at the septal wall; lat, mitral annulus at the left ventricular lateral wall; MR velocity, mitral regurgitation velocity; LV sphericity index, left ventricular sphericity index; RV S′, tricuspidal systolic wave signal as measured by tissue Doppler imaging.