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Over the past 50 years various animal models of hypertension have been developed, predominantly in the rat. In this review we discuss the use of the rat as a model of hypertension, and evaluate what these models have taught us. Interestingly, the spontaneously hypertensive rat (SHR) is by far the most widely used rat model, although it reflects only a rare subtype of human hypertension, i.e. primary hypertension that is inherited in a Mendelian fashion. Many other aspects of the etiology of hypertension are found in other rat models, but these models are less frequently employed. The widespread use of the SHR suggests that this rat model is often chosen without considering alternative (and possibly better suited) models. To illustrate the importance of the choice for a particular model, we compared the natural history and response to antihypertensive drugs in different rat models of hypertension (SHR, Dahl …