Wide Pulse Pressure

Causes and Mechanisms

Aging leads to degenerative changes in the arterial walls with thinning and fragmentation of elastin fibers and increased collagen deposition, resulting in decreased arterial compliance 1
Increased aortic impedance from decreased aortic diameter or increased wall stiffness contributes to wide pulse pressure 1
Enhanced pressure wave reflection that augments central systolic pressure is a key mechanism in wide pulse pressure 1
Endothelial dysfunction contributes to arterial rigidity, leading to wide pulse pressure 1
Aortic regurgitation causes increased stroke volume and diastolic runoff, resulting in wide pulse pressure 3
Isolated systolic hypertension, characterized by systolic BP ≥140 mmHg with diastolic BP <90 mmHg, is the most common form of hypertension in the elderly and is associated with wide pulse pressure 2

In the elderly, a wide pulse pressure (≥50 mmHg) may be a better marker for cerebrovascular disease and heart failure than mean or diastolic blood pressure 2
Wide pulse pressure is associated with increased cardiovascular morbidity and mortality, although the exact relationship is not fully understood 2

The auscultatory gap phenomenon in older patients with wide pulse pressure can lead to inaccurate blood pressure readings, and can be addressed by elevating the arm overhead for 30 seconds before inflating the cuff 4
Potential discrepancies between cuff measurements and true intra-arterial pressures can be as much as 25 mmHg in some individuals, highlighting the need for careful evaluation 5

The American Heart Association recommends careful evaluation of wide pulse pressure in older adults, as it reflects significant changes in arterial compliance and cardiovascular function 2