Tachycardias

A patient presents with a palpitation and a heart rate of 110 bpm. According to the image, which of the following best describes this rhythm?

Which of the following rhythms is typically considered a narrow QRS complex tachycardia?

The treatment of sinus tachycardia should focus on what?

Which of the following is classified as a narrow complex tachycardia?

A patient is diagnosed with Atrial Fibrillation (AF). Which of the criteria classifies their AF as paroxysmal?

Which of the following is a potential cause of atrial fibrillation?

An 80-year-old patient with atrial fibrillation is hemodynamically unstable. What is the immediate treatment of choice?

Which of the following is a long-term goal in the treatment of stable atrial fibrillation?

According to the CHA2DS2-VASc scoring system, which of the following factors contributes 2 points to the score?

A patient has a HAS-BLED score of 4. What does this indicate?

A patient with valvular atrial fibrillation requires anticoagulation. Which of the following is the recommended anticoagulant?

Which of the following medications is used for rate control in atrial fibrillation?

When is it recommended that patients be anticoagulated for 3 weeks before and after cardioversion from atrial fibrillation to normal sinus rhythm (NSR)?

A rhythm presents with a 'sawtooth' pattern on ECG. Which of the following is the most likely diagnosis?

According to the American Heart Association, which of the following rhythms is typically NOT classified as a supraventricular tachycardia (SVT)?

Which of the following best describes paroxysmal supraventricular tachycardia (PSVT)?

Various atrial flutter rhythms are shown. Determine the atrial rate with 4:1 AV block and a ventricular rate of 75 bpm.

The treatment for atrial flutter is similar to that of which other arrhythmia?

Electrical cardioversion is typically NOT effective in treating which of the following tachycardias?

In atrioventricular nodal re-entrant tachycardia (AVNRT), what describes the typical conduction pathway?

What is a characteristic ECG finding in Wolff-Parkinson-White (WPW) syndrome?

Which of the following best describes the mechanism of atrial tachycardia?

A patient is hemodynamically stable, but has SVT. Which of the following is an appropriate acute treatment?

A patient with symptomatic AVNRT undergoes catheter ablation. What is the primary goal of this procedure?

A patient is taking Amiodarone. Which of the following side effects is the MOST concerning?

According to the information provided, what characteristic defines a wide complex tachycardia?

Which of the following is a cause of wide complex tachycardia?

A patient with monomorphic ventricular tachycardia is pulseless. What does the treatment include?

Which electrolyte imbalance is MOST associated with Torsades de Pointes?

What is the appropriate intervention for ventricular fibrillation?

When following the AHA pulseless arrest algorithm, what is the treatment for a patient in asystole or PEA?

After ICD placement, what is the most significant complication?

What is the MOST important consideration when assessing an ICD shock?

A patient in the emergency department is diagnosed with atrial fibrillation and a rapid ventricular rate. The patient is also hypotensive and has altered mental status. Which of the following is the MOST appropriate next step?

A patient is diagnosed with Multifocal Atrial Tachycardia (MAT). Which underlying condition is most commonly associated with this arrhythmia?

A 25-year-old female presents with recurrent episodes of palpitations, dizziness, and shortness of breath. ECG reveals a regular, narrow complex tachycardia at a rate of 180 bpm. The episodes start and stop abruptly. What would be the MOST likely diagnosis?

A patient in the emergency department is found to have a wide-complex tachycardia. The rhythm is irregular, and the QRS complexes vary in morphology, appearing to twist around the baseline. The patient has a history of hypokalemia and prolonged QT interval. Which arrhythmia is MOST likely?

A clinician suspects that a patient's narrow complex tachycardia may be Atrioventricular Nodal Reentrant Tachycardia (AVNRT). Which of the following would provide the STRONGEST evidence supporting that diagnosis based on the reentrant circuit?

Which factor from the HAS-BLED scoring system is weighted as the MOST impactful and thus predictive of increased bleeding risk on anticoagulation?

A patient is found to have a chaotic baseline with no discernible P waves and an irregularly irregular rhythm. They are hypotensive and lightheaded. Which is the next best step in management?

A 62-year-old with a history of mitral stenosis presents with new-onset palpitations. ECG confirms atrial fibrillation. Which medication is contraindicated for stroke prevention in this patient?

A patient presents with a narrow complex tachycardia and a visible delta wave on a prior ECG. They are now in orthodromic AVRT. Which of the following is most likely true regarding the QRS morphology during the tachycardia?

A 67-year-old female with a CHA₂DS₂-VASc score of 3 (Hypertension 1, Vascular disease 1, Female 1) and a HAS-BLED score of 4 is diagnosed with persistent atrial fibrillation. What is the most appropriate anticoagulation plan?

A patient develops a wide complex tachycardia while on amiodarone and has no pulse. What is the most appropriate next step?

A man with COPD is admitted for worsening dyspnea. ECG reveals a tachyarrhythmia with at least three distinct P-wave morphologies, irregular atrial rate >100 bpm, and variable P-R intervals. Which of the following is most likely true regarding this condition?

Which antiarrhythmic is most likely to cause a lupus-like syndrome, especially in slow acetylators?

A patient with known hypertrophic cardiomyopathy develops sustained wide complex tachycardia with a pulse. He is awake and alert with stable blood pressure. What is the most appropriate acute treatment?

A patient with palpitations is found to have a regular narrow complex tachycardia at 170 bpm. Vagal maneuvers fail to terminate the rhythm. Which drug is most likely to terminate AVNRT?

Which antiarrhythmic most often causes both hypothyroidism and pulmonary fibrosis?

A patient with a regular narrow complex tachycardia undergoes a Valsalva maneuver without success. Intravenous adenosine subsequently terminates the rhythm. Which of the following is most likely the underlying electrophysiologic mechanism?

A patient with Wolff-Parkinson-White (WPW) syndrome is given intravenous verapamil during an episode of atrial fibrillation. What is the most serious potential outcome of this intervention?

A 72-year-old female is found to have atrial flutter. She has a prior history of hypertension and vascular disease (prior MI). According to the CHA₂DS₂-VASc score, what is her score?

A patient is diagnosed with atrial fibrillation of 10-day duration. He is hemodynamically stable and has not been on therapeutic anticoagulation. What is the next best step before proceeding to planned electrical cardioversion?

Which antiarrhythmic is most likely to cause the triad of cinchonism (tinnitus, headache, dizziness), thrombocytopenia, and diarrhea?

A conscious patient with stable vital signs presents with a regular, wide-complex tachycardia at 190 bpm. There is no history of structural heart disease. Which treatment is most appropriate as initial pharmacologic therapy?

An ECG shows a polymorphic ventricular tachycardia with a 'twisting' morphology around the isoelectric baseline and concurrent QT interval prolongation. Which of the following drugs is most appropriate for acute management?

A patient with an Implantable Cardioverter-Defibrillator (ICD) reports receiving multiple shocks recently. Telemetry and rhythm strips during the shocks show normal sinus rhythm without arrhythmias. What is the most important next step?

Which of the following antiarrhythmics is most likely to cause the combination of bradyarrhythmia, hepatotoxicity, photosensitivity, and thyroid dysfunction?

Use of which class of antiarrhythmics carries the highest risk of precipitating a 1:1 ventricular response during atrial flutter, potentially leading to a dangerously rapid heart rate?

A 74-year-old presents with a heart rate of 160 bpm. She is hypotensive, confused, and experiencing chest discomfort. ECG shows a regular narrow-complex tachycardia. What is the next best step?

A 58-year-old with a pulse presents with wide-complex monomorphic tachycardia. He is alert and normotensive. ECG shows QRS duration of 0.16 sec. What is the most appropriate treatment?

A 65-year-old man presents with a tachyarrhythmia. He is awake, normotensive, and ECG reveals narrow QRS complexes. What is the correct sequence of initial treatment according to AHA guidelines?

A patient with stable monomorphic VT is started on procainamide. After several minutes, hypotension occurs and QRS duration increases >50%. What is the correct action?

A 45-year-old man presents with palpitations and dizziness. HR is 190 bpm. He is hemodynamically stable. ECG shows a wide-complex rhythm. Adenosine is considered. What condition must be met for adenosine to be appropriate?

A patient presents with a wide QRS tachycardia. Rhythm is irregular and twisting. Which of the following medications is contraindicated?

Which of the following synchronized cardioversion doses is correct for a narrow irregular rhythm per AHA guidelines?

A 66-year-old man with CHF and wide-complex tachycardia receives sotalol 100 mg IV. He develops bradycardia and a prolonged QT. What is the most appropriate action?

A 79-year-old woman on warfarin with labile INRs and frequent bruising is evaluated for anticoagulation in AF. Her HAS-BLED score is 4. What is the correct action?

A 53-year-old man with AVNRT is treated with adenosine. What transient adverse effect is most likely to occur during administration?