Table 2.
Estimated point prevalence of abnormalities of cardiac rhythm, structure, and function in North American IWs
| Prevalence (%) | 95% CI | Sex (%M) | P value | Median age (affected/unaffected) | P value | |
|---|---|---|---|---|---|---|
| AF | 55/618 (8.9) | 6.6‐11.2 | 38.1 | 0.88 | 5.58/2.92 | 0.0001 |
| AFlone | 24/600 (4) | 2.4‐5.6 | 41.7 | 0.81 | 5.42/3 | 0.0002 |
| SVTA | 6/618 (1) | 0.2‐1.7 | 50 | 0.68 | 6.23/3.01 | 0.04 |
| VTA | 16/618 (2.6) | 1.3‐3.8 | 37.5 | 0.89 | 3.67/3.01 | 0.46 |
| LVdil | 38/645 (5.9) | 4.1‐7.7 | 52.6 | 0.08 | 5.74/3 | 0.0001 |
| LVdys | 39/645 (6) | 4.2‐7.9 | 51.2 | 0.12 | 5.95/2.99 | 0.0001 |
| LAE | 44/627 (7) | 5‐9 | 43.2 | 0.6 | 5.2/2.99 | 0.0001 |
| CM | 11/627 (1.8) | 0.72‐2.8 | 45.5 | 0.76 | 5.13/3.02 | 0.03 |
| IWCM | 11/627 (1.8) | 0.72‐2.8 | 63.6 | 0.12 | 5.95/3.01 | 0.0003 |
Note: Because of missing observations, the numbers of IW that provided data for estimation of prevalence were not the same for all abnormalities.
Abbreviations: AF, atrial fibrillation; AFlone, AF identified in the absence of echocardiographic abnormalities; CI, confidence interval; CM, cardiomyopathy; IW, Irish Wolfhound; IWCM, Irish Wolfhound cardiomyopathy; LAE, left atrial enlargement; LVdil, left ventricular dilatation; LVdys, systolic myocardial dysfunction; SVTA, supraventricular tachyarrhythmia exclusive of AF; VTA, ventricular tachycarrhythmias.