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ISFM points to an editorial published ten years ago in The Lancet (Hypertension: uncontrolled and conquering the world), which presented alarming facts about hypertension in people: the risk of becoming hypertensive during a lifetime exceeds 90% for people in developed countries, with over 1.5 billion adults expected to have hypertension by 2025. It also said: 'screening is not done systematically, and the diagnosis is often made at a late stage when target organ damage has already happened'.
The Society says there are broadly similar concerns in our feline companions. Hypertension is a well-recognised condition in older cats, yet probably remains significantly underdiagnosed. The consequences can be severe, with target organ damage typically affecting the eyes, heart, brain and kidneys. Some damage, such as blindness resulting from complete retinal detachment, is irreversible. Other damage, however, is more amenable to antihypertensive treatment, highlighting the importance of early diagnosis and intervention. However, this presents challenges, particularly as routine blood pressure monitoring is generally performed infrequently in cats. Furthermore, cats are notoriously susceptible to stress in the veterinary clinic, which can lead to 'white coat hypertension' and hamper interpretation of results.
The new ISFM consensus guidelines are published in its Journal of Feline Medicine and Surgery1. The recommendations are those of an expert panel of veterinary clinicians and academics gathered from the UK, Australia, New Zealand, Spain, France and the USA, and cover several key areas. They include: how often to monitor blood pressure for cats of different ages and health status; when antihypertensive therapy is justified based on different systolic blood pressure readings and evidence of target organ damage; and what an investigation of hypertensive cats should include.
Samantha Taylor, a specialist in feline medicine and one of the co-chairs of the guidelines panel, said: "Well-illustrated and easy to read, it is hoped that these guidelines will encourage more widespread monitoring of blood pressure in veterinary clinics to increase the early identification of this treatable condition, and prevent the severe clinical consequences of untreated hypertension."
Accompanying the guidelines, which are endorsed by the American Association of Feline Practitioners, are further resources to assist veterinarians with the diagnosis of hypertension. A blood pressure evaluation form can be downloaded from the supplementary material; in addition, a series of short videos produced by the ISFM on measuring blood pressure in cats is available in various languages at https://www.youtube.com/user/iCatCare/playlists.
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