How is narrow pulse pressure defined and what are the causes?
Narrow pulse pressure is defined as:
Pulse pressure less than 25% of the systolic blood pressure
i.e. (BP systolic & BP diastoic) <25% BP systolic
- Decreased stroke volume
- Pericardial tamponade
- Constrictive pericarditis
- Tachycardia
- Aortic stenosis
- Artificially produced in severely heightened vasomotor tone with increased peripheral vascular resistance, e.g. cardiogenic shock
