Podcast
Questions and Answers
A patient presents with a prolonged QRS interval on their ECG. Which of the following medications or conditions is least likely to be the cause?
A patient presents with a prolonged QRS interval on their ECG. Which of the following medications or conditions is least likely to be the cause?
- Hyperkalemia
- Beta-blockers (correct)
- Cocaine
- Tricyclic antidepressants (TCAs)
An ECG shows a prominent U wave. Which electrolyte imbalance is most likely present in this patient?
An ECG shows a prominent U wave. Which electrolyte imbalance is most likely present in this patient?
- Hyponatremia
- Hypercalcemia
- Hypokalemia (correct)
- Hyperkalemia
A patient's ECG shows a scooped ST segment. Which medication is most likely contributing to this finding?
A patient's ECG shows a scooped ST segment. Which medication is most likely contributing to this finding?
- Amiodarone
- Warfarin
- Lisinopril
- Digoxin (correct)
Which of the following ECG changes is commonly associated with hypothermia?
Which of the following ECG changes is commonly associated with hypothermia?
A patient's ECG shows an absent P wave. Which of the following could be a potential cause?
A patient's ECG shows an absent P wave. Which of the following could be a potential cause?
Which of the following medications is least likely to cause a prolonged QT interval?
Which of the following medications is least likely to cause a prolonged QT interval?
What ECG change is most indicative of hyperkalemia?
What ECG change is most indicative of hyperkalemia?
Which of the following sets of ECG changes is most likely associated with digoxin toxicity?
Which of the following sets of ECG changes is most likely associated with digoxin toxicity?
Which of the following conditions is associated with the presence of Osborn waves on an ECG?
Which of the following conditions is associated with the presence of Osborn waves on an ECG?
A patient's ECG shows a prolonged PR interval. Which medication could be contributing to this finding?
A patient's ECG shows a prolonged PR interval. Which medication could be contributing to this finding?
Tricyclic antidepressants (TCAs) can cause which of the following ECG changes?
Tricyclic antidepressants (TCAs) can cause which of the following ECG changes?
Concurrent use of quinidine and alcohol may result in which of the following ECG abnormalities?
Concurrent use of quinidine and alcohol may result in which of the following ECG abnormalities?
Which ECG finding is most likely associated with hypokalemia?
Which ECG finding is most likely associated with hypokalemia?
Which of the following will NOT cause a prolonged PR interval?
Which of the following will NOT cause a prolonged PR interval?
Which of the following is most likely to cause an absent P wave?
Which of the following is most likely to cause an absent P wave?
Which of the following is least likely to cause a prolonged QT interval?
Which of the following is least likely to cause a prolonged QT interval?
Which of the following scenarios/substances will cause hyperkalemia?
Which of the following scenarios/substances will cause hyperkalemia?
Which of the following is most likely to cause a notched P wave?
Which of the following is most likely to cause a notched P wave?
Aside from hypothermia, what may someone who presents with alcohol withdrawal also experience?
Aside from hypothermia, what may someone who presents with alcohol withdrawal also experience?
Which electrolyte imbalance is associated with flattened or inverted T waves on an ECG?
Which electrolyte imbalance is associated with flattened or inverted T waves on an ECG?
Flashcards
Absent P wave causes
Absent P wave causes
Absent P waves on ECG can be caused by digoxin, cholinergics, and hyperkalemia.
Notched P wave cause
Notched P wave cause
Notched P waves on ECG are associated with quinidine.
Prolonged PR causes
Prolonged PR causes
Prolonged PR interval can be caused by beta-blockers, calcium channel blockers (CCBs), magnesium, lacosamide, digoxin, and lithium.
Prolonged QRS causes
Prolonged QRS causes
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Scooped ST segment cause
Scooped ST segment cause
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Prolonged QT causes
Prolonged QT causes
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Peaked T wave cause
Peaked T wave cause
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Inverted T wave cause
Inverted T wave cause
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Scooped T wave cause
Scooped T wave cause
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Prominent U wave causes
Prominent U wave causes
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Osborn wave cause
Osborn wave cause
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Study Notes
- ECG findings related to toxicology
P Wave
- Digoxin, cholinergics, and hyperkalemia can cause the absence of a P wave
- Quinidine can cause a notched P wave
PR Interval
- Beta-blockers, calcium channel blockers (CCBs), magnesium, lacosamide, digoxin, and lithium can prolong the PR interval
QRS Complex
- Tricyclic antidepressants (TCAs), type 1 antiarrhythmics, cocaine, diphenhydramine, quinidine, and hyperkalemia can prolong the QRS complex
ST Segment
- Digoxin can cause a scooped ST segment
QT Interval
- Methadone, haloperidol, TCAs, lithium, chloroquine, arsenic, low potassium (K), calcium (Ca), magnesium (Mg), and alcohol can prolong the QT interval
T Wave
- Hyperkalemia can cause peaked T waves
- Hypokalemia can cause flat or inverted T waves
- Digoxin can cause a scooped T wave
U Wave
- Hypokalemia, quinidine, class Ia/III antiarrhythmics, and alcohol can cause a prominent U wave
Alcohol
- Alcohol can cause an Osborn wave (associated with hypothermia), bradycardia, and atrial fibrillation (during withdrawal)
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