ECG Interpretation Resource Practice Test

These questions are part of the practice quiz. Start practicing

• What does the T wave in an ECG represent?
• Which of the following findings is considered lethal?
• Which SA node finding is generally considered benign?
• Which of the following conditions could increase the frequency of PVCs?
• What is the expected morphology of the QRS complex during a PVC?
• How does the QRS complex respond to anti-arrhythmic medications like procainamide?
• What does axial rotation of the heart potentially indicate on an ECG?
• What is the duration threshold for vtach to be considered life-threatening?
• What may cause a lengthened QT interval?
• Identifying right ventricular hypertrophy is primarily assessed through which lead?
• What does the sound of "lub-dub_um" indicate?
• Which condition is least likely to cause T wave inversion?
• What finding is described as a generally benign AV node condition?
• What is the typical duration of Atrial Fibrillation?
• What are the classical signs of a myocardial infarction on an ECG?
• What does a deep Q wave represent in an EKG reading?
• What is the most likely cause of an AV block classified as 3rd degree?
• How is the QT interval measured?
• Which type of block may progress to 3rd degree AV block if heart rate is slow?
• In regard to 3rd degree AV block, which of the following statements is true?
• What is the normal duration of a QT interval for a heart rate of 60-100 bpm?
• Which finding is associated with a heart rate of greater than 350 bpm and saw-toothed P waves?
• What is the primary purpose of an electrocardiogram (ECG)?
• What does ST segment depression indicate?
• What is the normal heart rate range for adults on an ECG?
• How is the PR interval measured?
• What should be done if a patient's symptoms worsen during rest after experiencing dysrhythmias?
• How does ST segment elevation relate to heart conditions?
• What is the significance of a wide QRS complex?
• What type of medical attention is required for a lethal tachyarrhythmia?
• What does "sinus arrhythmia" mean?
• What is the significance of a flat or inverted T wave?
• What does a peaked T wave commonly indicate on an ECG?
• What effect do anti-arrhythmic drugs like amiodarone have on the QT interval?
• Which condition requires immediate CPR?
• What does counting 30 large boxes on an EKG strip allow you to do?
• What effect does a slow ventricular rate in third-degree AV block have on cardiac output?
• What is a common symptom of a prolonged PR interval in a patient with 1st degree AV block?
• What is the primary concern with frequent PVCs?
• Which method is used to determine if a rhythm is regular or irregular?
• A depressed ST segment on an ECG is indicative of which condition?
• In the event of multiple abnormal heartbeats, what should the patient be advised to do?
• What does the term "pre-excitation" mean in relation to ECG?
• What effect does hyperkalemia have on the duration of the QRS complex?
• Which of the following is NOT a common cause of 3rd degree AV block?
• What is the standard method for calculating heart rate from an EKG?
• What does a Premature Ventricular Complex (PVC) indicate?
• What effect may digitalis have on the QT interval?
• The PR interval should not exceed what duration?
• What are the two major types of 2nd degree AV block?
• Which type of 2nd degree AV block involves progressive prolongation of the PR interval?
• Beta blockers generally have what effect on heart rate?
• What does "MAT" stand for in the context of ECG interpretation?
• What is the ventricular rate threshold for vtach?
• What is the normal duration of the PR interval?
• What does ST segment elevation typically signify?
• What is the defining characteristic of atrial flutter?
• What indicates a 1st degree AV block?
• What effect does a zone of injury have on the ST segment?
• In a third-degree AV block, how do the atrial and ventricular rates behave?
• Which finding is classified as a lethal ventricular condition?
• A zone of infarction produces what type of Q wave in the QRS complex?
• What does ischemia refer to in terms of myocardial supply?
• What are common causes of third-degree AV block?
• A normal QT interval is important for what aspect of heart function?
• In what situation might you expect to see upright T waves?
• Can ST segment elevation occur due to a benign early repolarization pattern?
• How is the heart rhythm described when Atrial Fibrillation occurs?
• Which arrhythmia is characterized by a rapid atrial depolarization rate between 350 and 600 beats per minute?
• What is the effect of hyperkalemia on an ECG?
• What could be the cause of worse symptoms during rest after a patient has dysrhythmias?
• Why might a patient have a prolonged PR interval or 1st degree AV block?
• In Atrial Fibrillation, what is typically observed on an EKG?
• What role does lead V1 play in ECG interpretation?
• What often results from inadequate oxygen to the myocardium?
• If a patient's symptoms improve with rest after having dysrhythmias, what is the appropriate next step?
• What is characterized by atrial fibrillation at a rate of less than 100 bpm?
• What does a "long QT syndrome" increase the risk for?
• What are the standard leads in a 12-lead ECG?
• How do T waves in ischemia generally appear compared to a normal heart?
• What type of ventricular rhythm is characterized by slow, regular beats?
• Define "NSTEMI" in terms of ECG findings.
• How does digitalis affect the T wave?
• What are P waves typically like in a vtach event?
• Which of the following indicates a potentially dangerous atrial finding?
• A deep Q wave is indicative of what condition?
• What does ST segment elevation indicate?
• What does the presence of paroxysmal supraventricular tachycardia indicate?
• What is a common cause of ventricular tachycardia?
• What is the standard protocol if a patient presents with new hypotension alongside previous ECG findings?
• Which electrolyte imbalance can cause ischemic changes on an ECG?
• What is a potentially dangerous finding in the SA node?
• What clinical aspect is often monitored in patients with Atrial Fibrillation?
• What can happen if heart rate is slow during Mobitz type 2 block?
• T wave inversion on an EKG may signal which condition?
• What is Wolff-Parkinson-White syndrome identified by on an ECG?
• How does a PVC affect the cardiac cycle?
• What is the implication of a skipped beat in 2nd degree AV block?
• How do you calculate heart rate when a full 6-second view is not available?
• What is the term for the point where the QRS complex meets the ST segment?
• How long does a large box on an EKG strip last?
• What is the most common cause of sinus tachycardia?
• What type of abnormalities can be suggested by changes in heart position seen on an ECG?
• How does hyperkalemia affect the P wave?
• What describes a condition of AV conduction disturbance with intermittent impulses between the atria and ventricles?
• How does hypothermia appear on an ECG?
• What does a right axis deviation suggest?
• What typically results during a PVC in terms of heart contractility?
• If a patient is stable after dysrhythmias with no prior conditions, what's the suggested action?
• Which of the following best describes the appearance of T waves in a normal heart?
• How does atrial fibrillation typically manifest on an ECG?
• Which of the following best describes the P wave in Atrial Fibrillation?
• Which condition is a potentially dangerous ventricular finding?
• Which part of the ECG represents ventricular depolarization?
• What does ST segment depression typically not indicate?
• What is a major criterion for diagnosing acute myocardial infarction?
• What is the consequence of irreversible damage to the myocardium?
• Which condition is stated to be worse: injury or ischemia?
• For patients experiencing frequent PVCs, which lifestyle change might be recommended?
• Which EKG measurement indicates the time it takes for electrical activation of the ventricles?
• Using ECG, what might indicate abnormalities in the heart’s electrical conduction system?
• What indicates the presence of a third-degree AV block on an ECG?
• What can hypokalemia lead to in terms of cardiac ECG findings?
• How can you differentiate between a PVC and a PAC?
• Vasospasm is associated with which type of ECG changes?
• What are common causes of ventricular fibrillation?
• In terms of treatment, which intervention is commonly considered for symptomatic Atrial Fibrillation?
• Which type of second-degree AV block is considered more serious?
• Which condition is characterized by the ventricles quivering asynchronously?
• What might indicate the presence of acute pericarditis on an ECG?
• What should be addressed if an ECG finding is new before starting exercise?
• Which of the following is the earliest sign of acute transmural infarction?
• Which of the following findings is a characteristic marker of infarction?
• Describe the appearance of an ECG in hypercalcemia.
• How is ST elevation defined in terms of lead displacement?
• In what instance would a T wave inversion primarily occur?
• What is the characteristic of a 2nd degree AV block type 1?
• Which of the following is a normal duration for the QRS complex?
• What is the characteristic sign of ventricular fibrillation (vfib)?
• Which ventricular finding is considered generally benign compared to others?
• In which condition are all impulses blocked at the AV node, preventing transmission to the ventricles?
• How is myocardial injury defined in terms of cardiac troponin values?
• Patients with vtach often experience what change in blood pressure?
• What is the significance of T wave inversion in ECG interpretation?
• What is one of the common causes of ischemic changes observed on an ECG?
• A zone of ischemia typically produces what variation in the ST segment?
• Which degree of AV block is considered potentially dangerous?
• What is required for a patient with a third-degree AV block, making it a medical emergency?
• A shortened QT interval may be caused by what condition?
• In vfib, what is the expected outcome for cardiac output?
• Which condition can be associated with digitalis toxicity?
• During a PVC, which wave is typically absent from the EKG?
• What change is observed in the T wave when taking drugs like quinidine?
• What does a high heart rate with a QRS width greater than 0.12 seconds suggest?
• T wave inversion may also occur after which event?
• What side effect do nitroglycerine or albuterol commonly cause?
• What are common causes of ventricular asystole?
• How should bradycardia be managed if it is less than 50 bpm?
• What aspect of the ECG can help identify potential ischemic heart disease?
• If a patient exhibits dysrhythmias with symptoms or more than 6 abnormal beats per minute, what action should be taken?
• What effect does hypokalemia have on the T wave?
• What is the condition identified as ventricular standstill with no rhythm?
• In the presence of ischemia, the J point is typically characterized by what?
• What effect does hypercalcemia have on the QRS complex?
• What method can be used to detect an irregular heart rate in the absence of an ECG?
• How can one differentiate between junctional escape rhythm and 2nd degree AV block?
• The QRS complex should not be wider than how long?
• Describe a "premature ventricular contraction" (PVC).
• What is indicated by a PR interval longer than 0.20 seconds?
• In a normal ECG, what does the P wave indicate?
• Ventricular fibrillation leads to which outcome if untreated?
• What is considered a significant or abnormal Q wave duration?
• In an ECG, what does the term "Q wave" signify?
• How many consecutive PVCs classify a ventricular tachycardia (vtach) event?
• How does low calcium levels affect the QT interval?
• What does a "Bifascicular block" refer to?
• Can a T wave be normally inverted in juveniles?
• What is an ST segment depression indicative of?
• Which finding includes isolated PVCs under 6 per minute?
• T wave inversion is most commonly a sign of which condition?
• What characterizes Mobitz type 2 block?
• Ventricular tachycardia (vtach) can potentially progress to which serious condition?
• Define "ventricular fibrillation" and its ECG appearance.
• Patients experiencing vfib will often become what?
• What ECG changes are associated with left ventricular hypertrophy?
• What does the term "tachycardia" mean in ECG interpretation?