Question | Answer |
SA NodeSinoatrial Node | Bodies natural pacemakerRegulates heart beat |
Depolarization | Contraction of cardiac cells |
Repolarization | Recovery of the heart |
Polarization | Heart relaxes briefly |
P-Wave | Atrial depolarizationRecorded as a + deflection |
QRS-Wave | Ventricular depolarization |
T-Wave | Ventricular repolarization Recorded as + deflection |
Lead 1 | Records electricle activity between RA + LA |
Lead 2 | Considered a rhythm strip records seperat and longer 6-12 inchesRecords electrical activity between RA + LL |
Lead 3 | Records electrical activity between LA + LL |
aV | Augmented Voltage |
aVR | Records electrical activity midpoint between LA added to LL directed to RA |
aVL | Records electrical activity midpoint between RA added to LL directed to LA |
aVF | Records electrical activity midpoint between RA added to LA directed to LL |
V1 | 4th intercostal space R of sternum |
V2 | 4th intercostal space L of sternum |
V4 | 5th intercostal space middle at about the left nipple |
V3 | Midway between V2 and V4 |
V6 | Horizontal to V4 left axillary line |
V5 | Horizontal to V4 left anterior axillary line Between V4 and V6 |
Measurement for ECG | Millavolt1 mv = 10 mm high |
Wandering Baseline Artifacts | Stylus moves from center of the paperFrom not enough gel |
Interupted Baseline Artifact | Breaks between waves Wires may be detached or electrode falls off |
Somatic Tremor Artifact | Jaggard peaks Partient not being still |
Ace Interferance | Small regular peaks Lead wires could be crossed use 3 prong outlet for 3 prong plug |
Normal Adult HR | 60-100 bpm |
Bradycardia | Less than 60 bpm cardiac arrythmia |
Tachycardia | Greater than 100 bpm cardiac arrythmia |
Atrial Fibrillation | extreme repid 400-500 bpm P wave cant distiguish to record it |
Ventricular Arrythmia | Premature Ventricular contractions considered common disturbances |
Ventricular Tachycardia | V-Tach life threating can turn into fibrillation or cardiac standstill |
PTCA Percutaneous Transluminal Coronary Angioplasty | Balloon like angioplasty catheter into femoral artery and threaded to heart |
ICD Implantable Cardioverter Defibrillator | Implanted into chest wall with wires leading to heart and will give a shock to get heart into normal rhythm |
CAB Coronary Artey Bypass | Part of vein reattached pass blockage to reestablish blood flow to heart |