Intro paragraph? These worksheets are for self-study only. Answers will not be evaluated.
Instructions for Chapter 15 Worksheets
- Complete basic measurements.
- Note if inverted T waves or ST segment depression is present. Note the presence of Q waves or Q wave equivalents as described in columns A, B, and E in Figure 15.12. Diagnose Q wave infarction according to the patterns in Table 15.2. Next, attempt to estimate timing of the infarction according to the T and ST abnormalities by using Table 15.1. Lastly, interpret T or ST abnormality according to the three Rules of the T Waves.
- Provide an interpretation.
Clinically-Based Critical Thinking: Interpretation
Diagnose inferior infarction based on the Q waves in the inferior leads. There is a wide R wave in leads V1 and V2, which is equivalent to a posterior wall Q wave. The inverted T waves in the inferior leads suggest that the infarction may have been recent. However if this is the only EKG, Rule 1 of the T Waves is in effect. The T inversion may be due to the previous Q wave infarction, but it may also be a new event! More information is necessary.
Worksheet 15.1
Complete the basic measurements, evaluation, and interpretation for the EKG below.
Parameter | Measurement | Interpretation |
HR | ||
Rhythm | ||
PR | ||
QRS | ||
QT | ||
QTc | ||
P direction | ||
QRS direction |
Abnormal parameter | If present, note the leads or location |
Inverted T waves | |
ST depression | |
ST elevation | |
Q waves or equivalents |
Worksheet 15.2
Complete the basic measurements, evaluation, and interpretation for the EKG below.
Parameter | Measurement | Interpretation |
HR | ||
Rhythm | ||
PR | ||
QRS | ||
QT | ||
QTc | ||
P direction | ||
QRS direction |
Abnormal parameter | If present, note the leads or location |
Inverted T waves | |
ST depression | |
ST elevation | |
Q waves or equivalents |
Worksheet 15.3
Complete the basic measurements, evaluation and interpretation for the EKG below.
Parameter | Measurement | Interpretation |
HR | ||
Rhythm | ||
PR | ||
QRS | ||
QT | ||
QTc | ||
P direction | ||
QRS direction |
Abnormal parameter | If present, note the leads or location |
Inverted T waves | |
ST depression | |
ST elevation | |
Q waves or equivalents |
HR 115, sinus tachycardia. This may represent shock or CHF. The PR interval is normal. The QRS is normal at 0.08 seconds. The QT is 0.320 seconds. The QTc is 0.44 which is high. There is ST elevation in leads V1 to V4. By the Third Rule of the T Waves, ST elevation in two contiguous leads takes precedence over the ST depression in II, III, and AVF, which represents reciprocal changes. Therapy is aimed at immediate opening of the artery by angioplasty or thrombolysis.