Key result
Blood pressure variability independently predicts higher risk of stroke, ischemic heart disease, and mortality.
Why the study?
Despite its prognostic importance, blood pressure variability is not assessed routinely, and there is a paucity of its clinical application.
Blood pressure variability provides crucial prognostic information beyond mean absolute values, highlighting the need for its routine clinical assessment and potential targeted control.
Answers are grounded in this paper and cite their sources.
BP variability may refine risk stratification beyond mean BP; leaves open whether targeted reduction improves outcomes in trials.
Systemic blood pressure, recorded by various parameters, always shows variation. This is known as ‘variability’, an entity not assessed routinely. Research has shown greater prognostic importance of it than routine parameters. Various intrinsic and extrinsic factors modulate it. Depending on the interval of successive readings, blood pressure variability is of five types, with different non-invasive methods utilized for recording. It is calculated by various statistical parameters, the most common being standard deviation, but average real variability is the most accurate and easily applied. Clinical evidence is increasing rapidly, indicating variability as a prognostic marker for stroke, ischemic heart disease, renal failure, cognitive dysfunction, heart failure, and mortality. Therapeutic measures for the control of variability have also been forwarded. The paucity of clinical application of blood pressure variability is the stimulus to narrate this review, especially for physicians managing hypertensive patients.
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Imran Hameed (2023) conducted a review in Blood pressure variability. Blood pressure variability was evaluated. Blood pressure variability is a significant prognostic marker for adverse outcomes such as stroke, ischemic heart disease, and mortality, independently of mean blood pressure values.
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