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EKG Study Guide 8&9
| Question | Answer |
|---|---|
| Lead V1 views what? | Right ventricular part |
| Lead II views the ______ wall of the left ventricle | Inferior |
| Lead I is perpendicular to what lead? | avF |
| Lead V5 views the ________ wall of the left ventricle | Lateral |
| Indicative ECG changes observed in leads v1, v2, v3, and v4 suggest that the _______ wall of the _______ ventricle is affected | Anteroseptal, left |
| Anterior or lateral wall myocardial infractions are most often a result of an occlusion of the _______ coronary artery | Left |
| Leads ____ and _____ face the septum | V1 and V2 |
| What is hypertrophy? | Increase in the thickness of a heart chamber because of chronic pressure overload |
| Patients who experience a(n) _______ myocardial infraction have a greater incidence of heart failure and cardiogenic shock than those who myocardial infarction other areas of the left ventricle | Anterior wall |
| What leads should be used to view the right ventricle? | V4R |
| Poor R - wave progression is a phrase used to describe R waves that decreases in size from V1 to V4. This is often seen in an _________ infarction | Anteroseptal |
| The second letter of the pacemaker identification code represents what? | The chamber sensed |
| What ECG change is one of the earliest to occur during and ST elevation infarction, but may have resolved by the time the patient seek medical assistance? | Hyperacute T waves |
| Normal electrical axis lies between _______ degrees | 0 and +90 |
| The inferior wall of the left ventricle is supplied by the ________ coronary artery in most of the population | Right |
| Which leads look at adjoining tissue in the anterior region of the left ventricle? | V3 and V4 |
| In pacing what does threshold refers to what? | The minimum level of electrical current needed to consistently depolarize the myocardium |
| What is Capture? | The ability of pacing stimulus to successfully depolarize the cardiac chamber that is being paced |
| Where should the positive electrode from lead V5 be positioned? | Left anterior axillary line at same line as V4 |
| A standard 12-lead ECG provides views of the heart in _______________ | Both frontal and horizontal plane |
| In pacing sensitivity refers to what? | The ability of a pacemaker to increase pacing race |
| What does Lead I view? | The left lateral side |
| What does Lead aVL view? | Left lateral side of the heart |
| The first letter of the pacemaker identification code represents what? | The chamber paced |
| Where should the positive electrode for lead V1 be positioned? | 4th intercostal |
| In pacing rate modulation refers to what? | The ability of a pacemaker to increase the pacing rate in response to physical activity or metabolic demand |
| Which leads look at adjoining tissue in the inferior region of the left ventricle? | II, III, avF |
| A(n) __________ is a vertical line on the ECG that indicates the artificial pacemaker has discharged. | Pacemaker spike |
| A demand pacemaker is also known as a ________ pacemaker. | Synchronous |
| When reviewing a 12 lead ECG, intervals and usually expressed in _________ | Milliseconds |
| The axes of leads I, II, III form an equilateral triangle with the heart at the center if the augmented limb limb leads are added to this configuration and the six leads moved in a way in which they bisect each other, the result is the ____________ | Hexaxial reference system |
| True or false - when evaluating an ECG with a LBBB a Q wave can make it complicated while assessing for dead myocardial tissue. | True |
| Lead V3 views the __________ wall of the left ventricle. | Inferior |
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