Cardiovascular and Pulmonary: Metabolic and Drug Influences on ECG

Question 1

Potassium Levels: Hyperkalemia

Answer 1

• Widens QRS
• Flattens P wave
• T wave becomes peaked

Question 2

Potassium Levels: Hypokalemia

Answer 2

• Flattens T wave

- Produces U wave

Question 3

Calcium Levels: Hypercalcemia

Answer 3

• Widens QRS

- Shortens QT interval

Question 4

Calcium Levels: Hypocalcemia

Answer 4

• Prolonges QT interval

Question 5

Hypothermia

Answer 5

• Elevates ST segment

- Slows Rhythm

Question 6

Drug: Digitalis

Answer 6

• Lowers ST segment
• Flattens or inverts T wave
• Shorter QT interval

Question 7

Drug: Quinidine

Answer 7

• QT Lengthens
• Flattens or inverts T wave
• QRS lengthens

Question 8

Drug: Beta Blockers

Answer 8

• Decreases HR

- Blunts HR response to exercise

Question 9

Drug: Nitrates

Answer 9

• Increases HR

Question 10

Drug: Anti-arrythemic Agents

Answer 10

• May prolong QRS and QT intervals

Question 11

Holter Monitor

Answer 11

• Continuous ambulatory ECG monitoring

- Allows for correlation of symptoms to activities