Table 1.
Summary of clinical characteristics of the three groups classified by ISACHC system
| ISACHC I | ISACHC II | ISACHC III | |
|---|---|---|---|
| Mean ± SD | Mean ± SD | Mean ± SD | |
| Signalment | |||
| n (117) | 17 | 30 | 70 |
| Age (year) | 8.60 ± 2.60 | 8.57 ± 2.20 | 9.50 ± 2.20 |
| BW (kg) | 6.49 ± 4.21 | 5.88 ± 3.36 | 6.11 ± 3.37 |
| Sex | M (8), F (9) | M (14), F (16) | M (38), F (32) |
| Breed | Chihuahua (5) | Chihuahua (12) | CKCS (19) |
| Maltese (2) | CKCS (6) | Chihuahua (14) | |
| Mix (2) | Maltese (3) | Maltese (12) | |
| Mastiff bull Terrier (1) | Pomeranian (2) | Mix (5) | |
| CKCS (1) | Shiba (1) | Shih Tzu (4) | |
| Shih Tzu (1) | Papillon (1) | Schnauzer (4) | |
| Shetland Sheepdog (1) | Petit Basset (1) | Pomeranian (3) | |
| Papillon (1) | Shetland Sheepdog (1) | Poodle (2) | |
| Border collie (1) | Beagle (1) | Yorkshire Terrier (2) | |
| Poodle (1) | Shih Tzu (1) | Spitz (1) | |
| Dachshund (1) | Mix (1) | Dachshund (1) | |
| Beagle (1) | |||
| Welsh Corgi (1) | |||
| Papillon (1) | |||
| Clinical indices | |||
| VHS | 11.20 ± 1.30 | 11.90 ± 1.00 | 12.60 ± 1.20 |
| LA/Ao | 1.72 ± 0.49 | 2.10 ± 0.49 | 2.38 ± 0.54 |
| LVEDd (mm) | 32.90 ± 9.12 | 35.23 ± 6.66 | 37.74 ± 8.97 |
| LVEDs (mm) | 17.93 ± 7.41 | 18.09 ± 5.11 | 19.46 ± 7.19 |
| FS (%) | 46.71 ± 7.99 | 49.58 ± 6.97 | 55.42 ± 8.92 |
| EF (%) | 77.98 ± 8.78 | 80.15 ± 5.99 | 77.89 ± 5.13 |
| E (cm/s) | 91.50 ± 27.53 | 109.82 ± 25.90 | 118.62 ± 28.12 |
| A (cm/s) | 64.86 ± 14.73 | 70.83 ± 17.15 | 72.53 ± 31.01 |
Abbreviation: ISACHC, International Small Animal Cardiac Health Council; SD, standard deviation; BW, body weight; VHS, vertebral heart score; LA/Ao, left atrial‐to‐aortic diameter ratio; LVEDd, left ventricular end‐diastolic dimension; LVEDs, left ventricular end‐systolic dimension; FS, Fractional shortening; EF, Ejection fraction; E, velocity of E wave; A, velocity of A wave; CKCS, Cavalier King Charles Spaniel.