Term
| If a patient is in a hospital with 6 leads, which lead will be the most useful for you to read, and what part of the heart does it record? |
|
Definition
| Read V5 - it measures the L ventricle. |
|
|
Term
| If a patient has three leads, where are they placed? |
|
Definition
| 1 on each shoulder, and one over the L ventricle. |
|
|
Term
| Where are the 6 limb leads placed in a 12 lead ECG? |
|
Definition
| 1 on each shoulder (2), 1 on the abdomen, 1 on each wrist (2) and one on one ankle. |
|
|
Term
| If a patient has a Q-wave MI, what part of the heart has been affected? |
|
Definition
| The entire myocardial wall. |
|
|
Term
| What will the ECG strip look like from a patient with an acute MI? |
|
Definition
| There will be a Q wave, the S-T segment will be off the baseline that is set by the P-R interval, and often the T wave will be flipped. |
|
|
Term
| What does the ECG strip look like from a patient recovering from an MI? |
|
Definition
| The Q wave is still present, the T re-orients and the S-T segment returns to baseline. |
|
|
Term
| Compare a non-Q-wave MI to a Q-wave MI. |
|
Definition
| Non-Q-wave MIs are not as serious. They are only sub-endocardial, so they don't go through the full depth of the cardiac wall. |
|
|
Term
| How do you determine whether or not a Q-wave is significant/pathological? |
|
Definition
| When the Q is > 1 small block wide, or >1/3 the depth of the QRS complex. (A non-significant Q wave can be normal) |
|
|
Term
| What is an elevated S-T segment indicative of? |
|
Definition
|
|
Term
| What is depression of the S-T segment indicative of? |
|
Definition
|
|
Term
| Will you more commonly see elevated, or depressed S-T segments? |
|
Definition
|
|
Term
| What is the J-point on an ECG? What do we use it for, and how? |
|
Definition
| It is the angle of the curve between S and T. We use it to decide of the S-T segment is elevated or depressed, by looking 1 small block after the J point. If the S-T segment is elevated or depressed by >1 small block, it is significant. |
|
|
