Athletic Heart Syndrome
Terms in this set (15)
VO2 = (CO)(A-V o2 diff)
The higher the volume of the heart, the more tension required to sustain an interventricular pressure T = (P)(R/Thickness)
- Muscle Pump
- Plasma Volume Expansion
- TPR (total peripheral resistance)
- Sympathetic NS
What are the three determinants of SV and the seven sub-determinants?
Proportionally increased wall thickness and EDV which gives a normalized wall tension; VO2 max correlated with LV diameter
What is the morphology of a volume demand athlete?
Increased wall thickness will less of or no increase in EDV; wall thickness greater than volume demand athletes
What is the morphology of a pressure demand athlete?
1. Large SV
2. Low HR
What are two characteristics of an optimal performer?
Sinus Bradycardia, First Degree HB and Mobitz I
What are three common heart rhythm changes in athlete hearts?
Sinus Bradycardia and Sinus Arrhythmia
What two rhythms are associated with an increased vagal tone?
What % of athletes who have 1st degree heart block will also have 2nd degree heart block Mobitz type 1?
PVCs, VT, and Junctional Rhythm
Which three heart rhythms are NOT associated with athletic heart syndrome?
Because of apical mass increases (which reverse with detraining; 76%
Why does the axis tend to shift towards +90 in dynamic athletes? What percentage of athletes have voltage criteria for LVH?
Results from asymmetry in repolarization due to vagal tone
Why is early repolarization common in athlete hearts?
Tall, peaked - related to early repolarization
Inverted - related to QRS voltage, LV mass, septal and posterior wall thickness
What are common T-wave abnormalities in athlete hearts and why?