11. Electrocardiogram

11. Electrocardiogram - 11. Electrocardiogram I....

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
11. Electrocardiogram I. Electrocardiogram- ECG, EKG a. Cells stay depolarized i. Repolarization starts where depolarization stops b. Recording depolarization i. Depolarization is fast ii. Repolarization is slow c. Vector representation i. Magnitude- size of event length ii. Direction points towards event d. LV>>RV i. At rest no depolarization no vector 1. Early Septal depolarizes- up to the right 2. Later- Large number of cells net: left and down II. Electrodes and leads a. Recording EKG i. Lead I- Left arm (+) to right arm (-) ii. Lead II- Right arm (-) to left leg (+) iii. Lead III- Left leg (+) to left arm (-) b. Records only contractile cells III. Wave forms a. P wave- atrial depolarization i. 1 st part- RA ii. 2 nd part- LA b. QRS complex- ventricle depolarization i. Q (-) before (+) ii. R(+) iii. S (-) after (+) c. T wave- Ventricle repolarization- concordant with QRS complex d. Tp wave- atrial repolarization- masked by QRS complex IV. Intervals a. RR interval- time between beats
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/14/2010 for the course BIOLOGY bipn 100 taught by Professor Armour during the Spring '10 term at UCSD.

Page1 / 2

11. Electrocardiogram - 11. Electrocardiogram I....

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online