Bidirectional flow across a perforate cor triatriatum dexter in a dog with concurrent pulmonary, tricuspid, and mitral valve dysplasia
Publication date: February 2019Source: Journal of Veterinary Cardiology, Volume 21Author(s): C.M. Hokanson, J.D. Rhinehart, B.A. ScansenAbstractA 10-week-old male intact mixed breed dog presented for evaluation of suspected right-sided congestive heart failure. Echocardiographic imaging revealed a perforate cor triatriatum dexter (CTD), along with pulmonary valve stenosis and tricuspid and mitral valve dysplasia. In typical CTD cases, there is unidirectional blood flow across the dividing membrane, from the caudal into the cranial right atrial chambers. Owing to right-sided pressure alterations caused by the concurrent val...
Source: Journal of Veterinary Cardiology - January 27, 2019 Category: Veterinary Research Source Type: research
Transvenous pacing implantation: techniques, tips, and lessons learned along the way
Publication date: Available online 17 January 2019Source: Journal of Veterinary CardiologyAuthor(s): A.H. Estrada, H.W. Maisenbacher, A.E. Jones, R. Prošek, M.E. Kleman, R.M. BryantAbstractThe right ventricular apex has been the traditional site for lead placement in veterinary patients who require permanent cardiac pacing therapy for atrioventricular block and sick sinus syndrome. Implantation of leads in this location is a straightforward procedure that most veterinary cardiologists perform routinely. Pacing at the right ventricular apex, however, has been demonstrated to have long-term deleterious effects on the left v...
Source: Journal of Veterinary Cardiology - January 18, 2019 Category: Veterinary Research Source Type: research
Special issue: cardiac pacing
Publication date: Available online 29 December 2018Source: Journal of Veterinary CardiologyAuthor(s): Romain Pariaut (Source: Journal of Veterinary Cardiology)
Source: Journal of Veterinary Cardiology - December 30, 2018 Category: Veterinary Research Source Type: research
Quantitative assessment of two- and three-dimensional transthoracic and two-dimensional transesophageal echocardiography, computed tomography, and magnetic resonance imaging in normal canine hearts
ConclusionsMeasurements of LV, RV, and RA volumes via 3D TTE and LA volume and LV EF assessed by CTA compared best with CMR. Three-dimensional echocardiography had lower interrater and intrarater CV compared with 2D TTE. (Source: Journal of Veterinary Cardiology)
Source: Journal of Veterinary Cardiology - December 26, 2018 Category: Veterinary Research Source Type: research
Identification and management of a subacute right ventricular perforation by an active-fixation permanent pacemaker lead in a dog
Publication date: Available online 20 December 2018Source: Journal of Veterinary CardiologyAuthor(s): L. García-Guasch, C. Sá Borges, P. Sousa, J. Manubens GrauAbstractA 5-year-old short-haired dachshund was referred with a history of repeated syncope associated with a third-degree atrioventricular block. A permanent transvenous pacemaker with an active-fixation lead was implanted. In the following 3 weeks, the syncopal episodes reappeared owing to a loss of ventricular capture. The pacemaker was reprogrammed to higher output, and effective pacing was re-established. Thoracic radiographs and echocardiography failed to id...
Source: Journal of Veterinary Cardiology - December 21, 2018 Category: Veterinary Research Source Type: research
Artificial cardiac pacemaker placement in dogs with a cohort of myocarditis suspects and association of ultrasensitive cardiac troponin I with survival
ConclusionsThe negative association of US-cTnI with survival outcomes was mild, with age having a larger effect. Although a sudden death outcome may be seen more commonly in myocarditis suspects, group 3 survival time was similar to that of the entire canine population. Plausible infectious causes of myocarditis were infrequently identified. (Source: Journal of Veterinary Cardiology)
Source: Journal of Veterinary Cardiology - December 18, 2018 Category: Veterinary Research Source Type: research
Canine and human sinoatrial node: differences and similarities in the structure, function, molecular profiles, and arrhythmia
Publication date: Available online 14 December 2018Source: Journal of Veterinary CardiologyAuthor(s): A. Kalyanasundaram, N. Li, B.J. Hansen, J. Zhao, V.V. FedorovAbstractThe sinoatrial node (SAN) is the primary pacemaker in canine and human hearts. The SAN in both species has a unique three-dimensional heterogeneous structure characterized by small pacemaker myocytes enmeshed within fibrotic strands, which partially insulate the cells from aberrant atrial activation. The SAN pacemaker tissue expresses a unique signature of proteins and receptors that mediate SAN automaticity, ion channel currents, and cell-to-cell communi...
Source: Journal of Veterinary Cardiology - December 15, 2018 Category: Veterinary Research Source Type: research
Cardiovascular variables in eventing and endurance horses over a season
ConclusionCardiovascular examination variables of eventing and endurance horses throughout a competition season are reported here for the first time. Although the present study did not reveal significant changes, data should be interpreted carefully as only a small number of horses were examined. (Source: Journal of Veterinary Cardiology)
Source: Journal of Veterinary Cardiology - December 15, 2018 Category: Veterinary Research Source Type: research
Upper rate behavior in six dogs with dual-chamber pacemakers
ConclusionsClinicians who implant dual-chamber pacemakers should be aware of upper rate behavior in animal species with high heart rates. Optimal programming of dual-chamber pacemakers can be achieved by selecting programmed timing intervals to limit deleterious upper rate behavior and create a more physiologic ventricular response at maximum tracking rates. (Source: Journal of Veterinary Cardiology)
Source: Journal of Veterinary Cardiology - December 14, 2018 Category: Veterinary Research Source Type: research
Aortocavitary fistula secondary to vegetative endocarditis in a rabbit
Publication date: February 2019Source: Journal of Veterinary Cardiology, Volume 21Author(s): A. Martel-Arquette, S.S. Tjostheim, J. Miller, J. Carlson, C. MansAbstractA 4-year-old intact male mini lop rabbit (Oryctolagus cuniculus) was presented with a 2-week history of severe progressive lethargy. A right parasternal continuous heart murmur and an irregular rhythm were detected on physical examination. Echocardiography identified vegetative aortic and tricuspid valve (TV) endocarditis. There was an aortocavitary fistula between the right sinus of Valsalva into the right ventricle, creating a left-to-right intracardiac shu...
Source: Journal of Veterinary Cardiology - December 14, 2018 Category: Veterinary Research Source Type: research
Stent angioplasty for treatment of canine valvular pulmonic stenosis
Publication date: February 2019Source: Journal of Veterinary Cardiology, Volume 21Author(s): I. Sosa, S.T. Swift, A.E. Jones, A.H. Estrada, J.C. FudgeAbstractFour dogs presented for evaluation and treatment of severe pulmonic valve stenosis and underwent stenting of the pulmonic valve annulus using bare-metal balloon-expandable stents. All dogs survived the procedure with immediate reduction of the transpulmonary valve pressure gradient and increase in activity levels. One dog had a stent fracture and migration 1 month after the intervention. This dog underwent a second procedure, in which multiple stents were used to alle...
Source: Journal of Veterinary Cardiology - December 14, 2018 Category: Veterinary Research Source Type: research
Anatomical anomalies and variations of main thoracic vessels in dogs: a computed tomography study
ConclusionsMajor anatomical variations or anomalies of the main great thoracic vessels in dogs without congenital cardiac disease were rare. An aberrant retroesophageal right subclavian artery was the most common anomaly found. Three slight variations of common carotid artery branching were identified. These findings might be of relevance for surgical or catheterization procedures. (Source: Journal of Veterinary Cardiology)
Source: Journal of Veterinary Cardiology - December 14, 2018 Category: Veterinary Research Source Type: research
A pictorial view of the three-dimensional representation and comparative two-dimensional image orientation derived from computed tomography angiography in a dog with a patent ductus arteriosus
We describe the use of computed tomography angiography (CTA) images imported into three software programs as a tool to provide 3D information about PDA anatomy including a comparison to images obtained from classic two-dimensional imaging modalities. These images provide an example of thorax and heart position related to transducer position and the orientation of image acquisition to demonstrate why measurements do not always compare. Additionally, 3D images are useful as a training tool and in the development of devices and training opportunities. Multidimensional imaging provides a unique representation of the 3D anatomi...
Source: Journal of Veterinary Cardiology - December 13, 2018 Category: Veterinary Research Source Type: research
Epicardial pacemaker implantation in small animals
This article reviews the current literature and describes a minimally invasive approach for epicardial pacemaker implantation in small animals. The principal advantage of epicardial pacing is that it avoids contact with blood and intracardiac structures and thereby avoids uncommon but potentially devastating complications associated with endocardial pacemaker implantation. Epicardial pacing as a lone procedure can be accomplished via an abdominal transdiaphragmatic or minimal incision thoracotomy approach (minithoracotomy). A minithoracotomy offers the advantages of being less invasive and providing more direct access to ...
Source: Journal of Veterinary Cardiology - December 12, 2018 Category: Veterinary Research Source Type: research
Association between atrial fibrillation and right-sided manifestations of congestive heart failure in dogs with degenerative mitral valve disease or dilated cardiomyopathy
ConclusionsDogs with AF are more likely to manifest R-CHF than dogs without AF. Cavitary effusions are an expected finding in approximately three-quarters of dogs with AF and CHF secondary to either DCM or DMVD. (Source: Journal of Veterinary Cardiology)
Source: Journal of Veterinary Cardiology - December 12, 2018 Category: Veterinary Research Source Type: research
