The purpose of this study was to determine the ability of non-recordable telemetry to estimate arrhythmia severity in hospitalized dogs compared with Holter monitoring.
Ten dogs with arrhythmias were hospitalized and heart rates and rhythms were simultaneously monitored using non-recordable telemetry and Holter monitoring. Telemetry was assessed by trained ICU technicians for one-minute every hour and heart rate and rhythm were recorded. An arrhythmia scale was used to grade the arrhythmia severity: (Grade 0 = sinus, no VPCs; Grade 1 = single VPCs; Grade 2 = accelerated idioventricular; Grade 3 = bigeminy or trigeminy; Grade 4 = couplets or triplets; Grade 5 = ventricular tachycardia or R on T phenomenon). Holter data was analyzed by a board-certified cardiologist and arrhythmia grade was assigned to the same one-minute time period reported by ICU technicians. A one-hour arrhythmia grade was also determined from Holter data and was reported as the highest grade noted during the previous hour.
Cohen’s weighted kappa analysis was used to compare the agreement of ICU and Holter grade during the same one-minute time period. The same analysis was used to compare one-minute Holter grade with the prior hour Holter grade.
Clinically unacceptable agreements were found between ICU reported grade and Holter grade (κ = 0.40), as well as between one-minute Holter grade and prior hour Holter grade (κ = 0.37).
These results show that trained ICU technicians often incorrectly assess the severity of arrhythmias and hourly one-minute evaluations inconsistently estimate the severity of an arrhythmia.
University of Illinois College of Veterinary Medicine
Alina is a senior veterinary student at the University of Illinois.
Friday, June 15
5:00 PM – 5:15 PM
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