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EKG& ECG

electrocardiography

QuestionAnswer
What is Depolarization? occurs when sodium rushes in to the cell, resulting in a positive charge and start of electrical current flow
What is Re-polarization? when the cell is returned to his resting negative charge
What two things are the electrical events of hearts system called? Depolarization & Re-polarization
What are the two mechanical events of the hearts system ? Contraction & relaxation
True or False electrical precedes mechanical, there can be no heart beat (mechanical event) without first having had Depolarization(the electrical stimulus) TRUE
The Action Potential IN PHASE 4: what happens to the Ventricular muscle cell ? CARDIAC CELL IS AT REST, Its negatively charged, its resting with a trans membrane potential of 90 Milli volts, electrically nothing is happening
The Action potential IN PHASE 0: What happens to the cardiac cell ? The cardiac cell is stimulated, sodium rushes in to the cell, potassium leaks out which results in( depolarization)
What dose PHASE 0: correspond with on the EKG? the QRS COMPLEX
what dose PHASE 4 : Correspond to on the EKG? ( FLAT LINE ON THE EKG- FLAT LINES INDICATE ELECTRICAL SILENCE)
Created by: jflores2009