3. Cardiovascular System Flashcards
1
Q
Pacemaker
A
- small device placed in chest to help control abnormal heart rhythms
- uses electrical pulses to prompt normal rate
2
Q
Electrocardiograph, + chart
A
- records electrical activity of the brain
components of graph: - P wave: L&R atria contract
- QRS complex: L&R ventricles contract
- T wave: ventrical relaxation
3
Q
ECG Signal Recording, Wilson’s Central terminal
A
- represents heart as electric dipole, 12 leads
- 6 in frontal plane (main leads, augmented leads), 6 in tranverse plane
- WCT: adds CT in middle - 3 more leads
4
Q
Frequently encountered problems
A
frequency distortion
saturation / cutoff distortion
interference from electrical devices
