Holter monitoring in 36 dogs with myxomatous mitral valve disease

Abstract

Arrhythmias are a common finding in dogs with MMVD and Holter monitoring is a reliable tool for both HR monitoring and diagnosis.

Continuous Electrocardiography in Dogs and Cats

“…it is known that the variability decreases in the presence of heart failure in dogs with chronic myxomatous mitral valve (Crosara et al, 2010) and in advanced DCM (Calvert and Wall, 2001), and a study of HR variability in cats has not been found yet. Perhaps with more studies, HR variability will be more used in Veterinary Medicine Veterinary medicine is advancing at a very rapid pace, particularly given the breadth of the discipline.…”

Trigeminismo supraventricular em um cão com doença mixomatosa da valva mitral

“…One of the studies revealed that a significant percentage (69%) of dogs demonstrated isolated supraventricular premature complexes; however, the Holter monitoring did not indicate trigeminy (CROSARA et al, 2010;RASMUSSEN et al, 2012;OLIVEIRA et al, 2014). Some studies reported the occurrence of trigeminy; however, it was of ventricular origin (CROSARA et al, 2010). In veterinary medicine, there is one report of supraventricular trigeminy in a foal (RISBERG et al, 2005).…”

“…In studies evaluating cardiac arrhythmias in dogs with MMVD using conventional and Holter (24 hours) ECG, despite the higher incidence of arrhythmias of supraventricular origin, supraventricular trigeminy is not reported. One of the studies revealed that a significant percentage (69%) of dogs demonstrated isolated supraventricular premature complexes; however, the Holter monitoring did not indicate trigeminy (CROSARA et al, 2010;RASMUSSEN et al, 2012;OLIVEIRA et al, 2014). Some studies reported the occurrence of trigeminy; however, it was of ventricular origin (CROSARA et al, 2010).…”

“…The LA/Ao ratio is a measure that evaluates atrial stretch. Dogs with MMVD that showed a LA/Ao>1.7 had more supraventricular rhythm disturbances, suggesting that this parameter is associated with a risk of developing arrhythmias of supraventricular origin (CROSARA et al, 2010). Electrophysiological mechanisms by which atrial stretch leads to supraventricular arrhythmias are not fully understood, but studies suggest that volume and pressure overload in the heart can activate stretchactivated ion channels inducing atrial premature beats (NAZIR & LAB, 1996;KAMKIN et al, 1999).…”

“…Cardiac arrhythmias may complicate prognosis of mitral endocardiosis. Most often, arrhythmias have a supraventricular origin reflecting atrial stretch (TILLEY, 1992;CROSARA et al, 2010). Some echocardiographic parameters (e.g., LA/Ao ratio) provide valuable prognostic information for dogs with MMVD (BORGARELLI et al, 2008;SARGENT et al, 2015).…”