Your blood pressure goes up if your heart pumps more blood, if you have more blood in your body, or if your blood vessels become tighter — any one of these can push pressure higher.
Evidence from Studies
Supporting (1)
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Nitric oxide regulates basal systemic and pulmonary vascular resistance in healthy humans.
The study shows that when blood vessels become stiffer and resist blood flow more, blood pressure goes up, which supports the idea that resistance in blood vessels helps control blood pressure.
Contradicting (1)
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Hemodynamics of dexamethasone-induced hypertension in the rat
The study looked at how a steroid drug raises blood pressure in rats and found that even when blood vessel resistance was lowered, blood pressure stayed high, which goes against the idea that higher resistance always leads to higher blood pressure.
Gold Standard Evidence Needed
According to GRADE and EBM methodology, here is what ideal scientific evidence would look like to definitively prove or disprove this specific claim, ordered from strongest to weakest evidence.