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Cat Health News Blog

A resource for dedicated cat supporters

Since its start in 2007, Cat Health News has featured the latest information on feline health. The bi-weekly blog is a mix of the most current published research from Winn-funded research and other sources. There are over 875 blog post items and more than 1,000 subscribers through the RSS feed.


icon-blogWinn-funded research is specifically noted by the small green cat.

  • Exploring holter monitoring in cats with HCM

    Jan 19, 2018
    icon-blogW16-038   Holter monitoring in cats with hypertrophic cardiomyopathy in the home environment and assessment of daily arrhythmic spontaneous variability. (Winn-funded study; Ricky Fund for HCM), interim progress report.

    Principal Investigators: Drs. Katherine Scollan and Nicole LeBlanc; Oregon State University

    Hypertrophic cardiomyopathy (HCM) is a very common heart disease of cats causing their heart muscle to become thicker then normal.holter monitor and cat This disease also occurs in people and is the most common cause of sudden death in young adults. The cause of sudden death in people is thought to be due to a variety of cardiac arrhythmias, particularly those that arise from the thickened heart muscle. A substantial percentage of cats          with HCM die suddenly, but the cause of sudden death has not been investigated. Seven of the planned 20 cats with HCM have been enrolled and successfully completed the at home ECG recording for 3 days, which has never been performed in cats previously.

    Initial findings show that cats tolerate wearing the at home ECG recording device very well and substantial differences exist between cats and between days in regards to the number and severity of arrhythmias. The range of premature heartbeats ranged form 0 to over 2000 in a 24-hour period. The day-to-day variability in the number of premature heartbeats ranged from 6.5% to 100%. Five out of the seven cats with HCM (71%)      had a degree of arrhythmia severity indicative of an increased risk of sudden cardiac death, which is higher than previously suspected based on the minimal information that is known about arrhythmias in cats with HCM. Completion of this project will increase our understanding of arrhythmias in cats and potentially reduce the rate of sudden death in the future.

    Summary prepared for Winn Feline Foundation © 2018

    See also:
    Jackson BL, et al. Heart rate and arrhythmia frequency of normal cats compared to cats with asymptomatic hypertrophic cardiomyopathy. J Vet Cardiol. 2014 Dec;16(4):215-25.

    Hanas S, Tidholm A, et al. Twenty-four hour Holter monitoring of unsedated healthy cats in the home environment. J Vet Cardiol. 2009 Jun;11(1):17-22.


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