Too Much Too Little

Question 1

Athlete’s Heart; 5 defining traits

Answer 1

• Increase in heart mass & volume
• Greater LVEDV during rest and exercise
• Myocardial cell enlargement
• Increased LV cavity (eccentric hypertrophy)
• Modest thickening of its walls(concentric
  hypertrophy)

Question 2

Describe the chart in slide 9 (about blood flow)

Answer 2

increase in plasma and RBC volume = more total blood volume

Leads to increases in ventricular compliance, internal ventricular dimensions and venous return
which leads to more end diastolic volume

it also leads to greater myocardial contractility, which leads to a greater ejection fraction

These combined leads to a greater maximum stroke output

causes increases in…

maximum cardiac output

The effectiveness of cardiac output distribution

the optimization of peripheral flow

blood flow to active muscle