@article{mcmanamey_lake_defrancesco_2024, title={Cardiovascular images: pacemaker-lead fracture and excessive coiling in a dog}, volume={52}, ISSN={["1875-0834"]}, DOI={10.1016/j.jvc.2024.02.004}, abstractNote={A seven-year-old male castrated Labrador Retriever presented emergently due to concern for pacemaker malfunction five years after successful transvenous pacemaker implantation to treat partial atrial standstill. On presentation, the dog's pulse rate was 30–50 beats per minute. An electrocardiogram showed no spontaneous atrial activity or paced ventricular activity. Pacemaker interrogation revealed an increased impedance of 7557 ohms, indicating a lead malfunction. Thoracic radiographs confirmed the lead was fractured and had excessive coiling. The transvenous pacing system was turned off, left in place, and an epicardial pacing system was implanted the following day. The dog was discharged with no perioperative complications. The dog eventually required escalated medical therapy for progressive cardiac disease and was euthanized two years after implantation of the replacement pacemaker. This manuscript illustrates a complete lead fracture and excessive lead coiling, which has not previously been detailed in veterinary medicine.}, journal={JOURNAL OF VETERINARY CARDIOLOGY}, author={McManamey, A. K. and Lake, M. M. and DeFrancesco, T. C.}, year={2024}, month={Apr}, pages={68–71} }
 @article{mcmanamey_defrancesco_meurs_papich_2023, title={Pharmacokinetics of pimobendan after oral administration to dogs with myxomatous mitral valve disease}, volume={9}, ISSN={["1939-1676"]}, url={https://doi.org/10.1111/jvim.16891}, DOI={10.1111/jvim.16891}, abstractNote={AbstractBackgroundPimobendan is an important therapy for dogs with myxomatous mitral valve disease (MMVD). The pharmacokinetics are reported in healthy dogs but not in dogs with heart disease.Hypothesis/ObjectivesTo determine if dog characteristics such as age, breed, body condition score, ACVIM stage of heart disease or biochemical laboratory value alter the pharmacokinetics of orally administered pimobendan and its metabolite in a cohort of dogs with naturally occurring MMVD.AnimalsFifty‐seven client‐owned dogs with MMVD ACVIM Stage B2, C, or D and administered pimobendan to steady state blood concentrations.MethodsProspective, observational study. Samples were collected using a sparse‐sampling protocol at specific intervals after administration of pimobendan. Plasma pimobendan and the active metabolite (O‐desmethyl‐pimobendan, ODMP) concentrations were determined via high‐pressure liquid chromatography and fluorescence detection. Data was analyzed via a population pharmacokinetic approach and nonlinear mixed effects modeling (NLME). Numerous covariates were examined in the NLME model.ResultsThe absorption and elimination half‐lives (t1/2) were approximately 1.4 and 1 hour for pimobendan and 1.4 and 1.3 hours for ODMP, respectively. Pharmacokinetic parameters were highly variable, especially the values for pimobendan absorption and elimination rate, and absorption rate of ODMP with coefficients of variation of 147.84%, 64.51% and 64.49%, respectively. No covariate evaluated was a significant source of variability.Conclusions and Clinical ImportanceThe pharmacokinetic parameters were highly variable among this group of dogs with MMVD. The variability was not associated with the dog's age, body weight or condition score, stage of heart disease, dose, serum creatinine, or alkaline phosphatase.}, journal={JOURNAL OF VETERINARY INTERNAL MEDICINE}, author={McManamey, Anna K. and DeFrancesco, Teresa C. and Meurs, Kathryn M. and Papich, Mark G.}, year={2023}, month={Sep} }
 @article{walker_defrancesco_bonagura_keene_meurs_tou_kurtz_aona_barron_mcmanamey_et al._2022, title={Association of diet with clinical outcomes in dogs with dilated cardiomyopathy and congestive heart failure*}, volume={40}, ISSN={["1875-0834"]}, DOI={10.1016/j.jvc.2021.02.001}, abstractNote={Dilated cardiomyopathy (DCM) in dogs has been associated with feeding of grain-free (GF), legume-rich diets. Some dogs with presumed diet-associated DCM have shown improved myocardial function and clinical outcomes following a change in diet and standard medical therapy.Prior GF (pGF) diet influences reverse cardiac remodeling and clinical outcomes in dogs with DCM and congestive heart failure (CHF).A retrospective study was performed with 67 dogs with DCM and CHF for which diet history was known. Dogs were grouped by diet into pGF and grain-inclusive (GI) groups. Dogs in the pGF group were included if diet change was a component of therapy. Survival was analyzed using Kaplan-Meier curves and the Cox proportional-hazards model.The median survival time was 344 days for pGF dogs vs. 253 days for GI dogs (P = 0.074). Statistically significant differences in median survival were identified when the analysis was limited to dogs surviving longer than one week (P = 0.033). Prior GF dogs had a significantly worse outcome the longer a GF diet was fed prior to diagnosis (P = 0.004) or if they were diagnosed at a younger age (P = 0.017). Prior GF dogs showed significantly greater improvement in normalized left ventricular internal diastolic diameter (P = 0.038) and E-point septal separation (P = 0.031) measurements and significant decreases in their furosemide (P = 0.009) and pimobendan (P < 0.005) dosages over time compared to GI dogs.Prior GF dogs that survived at least one week after diagnosis of DCM, treatment of CHF, and diet change had better clinical outcomes and showed reverse ventricular remodeling compared to GI dogs.}, journal={JOURNAL OF VETERINARY CARDIOLOGY}, author={Walker, A. L. and DeFrancesco, T. C. and Bonagura, J. D. and Keene, B. W. and Meurs, K. M. and Tou, S. P. and Kurtz, K. and Aona, B. and Barron, L. and McManamey, A. and et al.}, year={2022}, month={Apr}, pages={99–109} }
 @article{mcmanamey_adin_elfenbeien_manship_2018, title={ECG of the Month}, volume={253}, ISSN={["1943-569X"]}, DOI={10.2460/javma.253.6.714}, number={6}, journal={JAVMA-JOURNAL OF THE AMERICAN VETERINARY MEDICAL ASSOCIATION}, author={McManamey, Anna K. and Adin, Darcy B. and Elfenbeien, Johanna R. and Manship, Arlie J.}, year={2018}, month={Sep}, pages={714–717} }