Key result
Body weight over 30 kg linked to ~25% higher EF in healthy Labrador retrievers.
Why the study?
The study aimed to establish reference ranges for cardiac parameters and evaluate the impact of body weight in clinically healthy Labrador retrievers due to the importance of cardiac diseases in pet dogs.
Does body weight influence radiographic and echocardiographic cardiac parameters in healthy Labrador retrievers?
Observational (n=16)
Does body weight influence radiographic and echocardiographic cardiac parameters in healthy Labrador retrievers?
Body weight significantly influences echocardiographic cardiac parameters in healthy Labrador retrievers, highlighting the need for weight-adjusted reference ranges in veterinary cardiology.
May support weight-adjusted echocardiographic norms in healthy Labradors; leaves open validation and clinical impact in diseased dogs.
Looking to the importance of emerging field of cardiac diseases in pet dogs, the present study was aimed to establish reference ranges for cardiac parameters and evaluate the impact of body weight in clinically healthy Labrador retrievers. During the study, 16 adult dogs (2-6 years) were divided into two groups based on body weight: Group I (<30 kg) and Group II (>30 kg). Diagnostic assessments including radiography and echocardiography were performed. Radiographic evaluations revealed vertebral heart scores (VHS) of 10.48 ± 0.21 and 10.18 ± 0.19 in Group I and II with no signs of cardiac enlargement. Echocardiography showed significant weight-related differences, with Group II exhibiting larger aortic and left atrial diameters, higher LA/Ao ratio and increased ventricular dimensions and wall thickness. Ejection fraction (EF) was higher in Group II (73.70 ± 1.81%) than Group I (58.89 ± 2.29%), while fractional shortening (FS) showed non-significant difference. End-diastolic (EDV) and end-systolic volumes (ESV) were significantly greater in Group II but remained within normal range. Doppler analysis showed non-significant differences in mitral, tricuspid, aortic, or pulmonic flow velocities. Based on results, it was concluded that body weight significantly influences cardiac parameters in Labrador retrievers underscoring the need for weight-adjusted reference ranges. The study highlights the utility of Doppler echocardiography and radiography for precise breed specific cardiac evaluation.
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Nanda et al. (2025) conducted an observational in Clinically healthy Labrador retrievers (n=16). Body weight >30 kg vs. Body weight <30 kg was evaluated on Ejection fraction. Body weight >30 kg in healthy Labrador retrievers was associated with a higher ejection fraction (73.70% vs 58.89%) and larger cardiac dimensions compared to dogs <30 kg.
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