A patient's blood pressure is 172/96 mm Hg. Which of the following is the LEAST likely the etiology?
- pericardial effusion
- aortic regurgitation
- arteriovenous fistula
- patent ductus arteriosus
Pericardial effusion would cause diastolic pressures. AV fistula would cause increased systolic pressures with decreased diastolic pressures as well. Thyrotoxicosis would cause high systolic, but low diastolic pressures (increased HR reduces filling time, so less EDV). PDA would cause increased systolic pressures with reduced diastolic pressures.