Chapter 19, Problem 3CCS

Summary Introduction

Case summary:

Captain Fallowell, an astronaut had been aboard at the international space station from last 8 months. He complained that he had increased heart rate and abnormal blood pressure while standing in the speech. Sometimes he feels dizziness while standing although his reflexes were normal with no any sign of head trauma.

Characters in the case:

Captain Fallowell.

Adequate information:

Captain Fallowell’s heart rate (HR) was 112 beats per minute during standing and 85 beats per minute while he was lying. It was noticed that he turned pale.

To determine:

The reason of dizziness on standing.

Given information:

After the medical checkup, Captain Fallowell’s HR was recorded at 112 and 85 beats per minute while standing and lying, respectively.