Overview
Pyloric obstruction refers to a blockage in the pyloric region, preventing the normal passage of gastric contents into the duodenum. In veterinary contexts, it can arise from various causes, including iatrogenic factors such as the placement of epicardial pacemakers 1.Diagnosis
Clinical Signs: Severe vomiting, exercise intolerance, and potential hind limb weakness 1.
Electrocardiographic Findings: Atrioventricular block with abnormal atrial and ventricular rates 1.
Imaging: Abdominal ultrasound and barium studies to confirm pyloric outflow obstruction 1.
Surgical Exploration: May be necessary to rule out anatomical abnormalities or other obstructive causes 1.Management
Repositioning of Pacemaker: If iatrogenic, repositioning the pacemaker generator away from the pylorus can resolve obstruction 1.
Surgical Intervention: Exploratory abdominal surgery to identify and address any anatomical causes 1.
Supportive Care: Fluid resuscitation and antiemetic therapy to manage symptoms 1.Special Populations
Pediatrics: Case reported in a young dog (10-year-old Lhasa Apso), highlighting potential iatrogenic complications in smaller animals 1.Key Recommendations
Reposition Pacemaker Generator: If pyloric obstruction is suspected due to pacemaker placement, reposition the generator away from the pylorus to alleviate symptoms (Evidence: Weak) 1.
Surgical Evaluation: Perform exploratory abdominal surgery to rule out anatomical causes of obstruction (Evidence: Weak) 1.
Monitor and Manage Symptoms: Implement supportive care measures including fluid therapy and antiemetics to manage clinical signs (Evidence: Expert opinion) 1.References
1 Bedoya Nader G, Kellihan HB, Bjorling DE, McAnulty J. Pyloric obstruction secondary to epicardial pacemaker implantation: a case report. Journal of veterinary cardiology : the official journal of the European Society of Veterinary Cardiology 2017. link