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lab practical
| Question | Answer |
|---|---|
| Repolaration | when the potassium goes out |
| P Wave | atrial depolarization cells in SA nodes; signal for contraction for atrial node no p signal no contraction |
| QRS | ventricular depolarization; produces a bigger signal for the contraction of ventricles |
| T Wave | ventricular repolarization; the rest button |
| PR Interval | allows atria to contract before ventricles can't be too short or too long so the heart doesn't have to overwork |
| QRS interval | needs to be a quick signal |
| QT interval | how long it takes to signal and reset signal (how fast the heart rate can go) |
| Normal heart rate | 60-100 |
| Sinus bradycadia | less than 60 |
| Sinus Tachycardia | more than 100 |