A 1.2-year-old male-intact Standard Poodle underwent transvenous placement of an Amplazter™ atrial septal occluder for correction of a large secundum atrial septal defect. Thirty-six hours post-operatively, the dog developed high-grade Mobitz type II second-degree atrioventricular block, which...

OBJECTIVE: To characterize the patterns associated with Lorenz plots (LPs) or Poincaré plots derived from the Holter recordings of dogs with various cardiac rhythms. ANIMALS: 77 dogs with 24-hour Holter recordings. PROCEDURES: A 1-hour period from the Holter recordings from each of 20 dogs without...

A one-year-old female English Springer Spaniel with no previous history of cardiac disease presented to the Queen's Veterinary School Hospital following a blunt traumatic incident with an acquired, direct Gerbode defect and associated third-degree atrioventricular block. Two months after the...

In humans, accessory pathways (APs) in an anteroseptal and midseptal position are often challenging to ablate because of their close proximity with the conduction pathways of the atrioventricular junction. The use of low-energy ablation techniques can be useful to reduce the risk of permanently...

Twenty dogs with chronic mitral valve disease were evaluated for the evidence of electrocardiographic variations. The changes recorded were atrial fibrillation, first degree atrioventricular block, second degree atrioventricular block, ventricular premature complex, sinus tachycardia, 'P' mitrale,...

The clinical signs, diagnosis, treatment and prognosis of atrioventricular block arrhythmia in a 9-year-old dog in the USA [date not given] are described.

Pyometra is considered the most common disease in intact bitches, being associated with potentially life-threatening disorders. Myocardial damage is a potentially life-threatening consequence of pyometra. The aim of this study was to describe the electrocardiographic patterns in bitches affected by ...

A 7-year-old male neutered Cocker Spaniel presented with a 6-hour history of severe tachypnoea. Cardiac evaluation revealed advanced second-degree atrioventricular block (2AVB) and biventricular congestive heart failure (CHF). Due to concerns of impending respiratory arrest, mechanical ventilation...

A 14-year-old American Staffordshire terrier was presented for episodes of exercise-induced syncope. At admission, atrial flutter coupled to third-degree atrioventricular block was diagnosed electrocardiographically. On the second day of hospitalization, surface electrocardiogram revealed...

Dexmedetomidine is a α-2 adrenergic agonist drug used in veterinary anesthesiology due to its sedative and analgesic properties. There are concerns about its side effects, especially cardiovascular, among them arrhythmias. These may compromise cardiac output and tissue perfusion. The arrhythmias...