Dysrhythmias II

Cardiovascular System


{"ops":[{"insert":"A 68-year-old man is comes to the physician for fatigue, lightheadedness and palpitations. He has a history of myocardial infarction and has been smoking 2 packs of cigarettes per day for 40 years. Pulse is 150\/min and blood pressure is 100\/60 mmHg. Cardiac examination shows a regular rate and rhythm and no murmur. Lungs are clear to auscultation. Electrocardiogram (ECG) shows a sawtooth atrial pattern which is positive in V1 and negative in II, III and AVF and a 2:1 atrial to ventricular rate ratio.\n\nWhich of the following is the most likely diagnosis?"},{"insert":"\n"}]}

Background

{"ops":[{"insert":"\n"}]}

(A)

Atrial flutter
{"ops":[{"insert":"\n"}]}

(B)

Atrial fibrillation
{"ops":[{"insert":"\n"}]}

(C)

Multifocal atrial tachycardia
{"ops":[{"insert":"\n"}]}

(D)

Sinus tachycardia
{"ops":[{"insert":"\n"}]}

(E)

Junctional tachycardia
{"ops":[{"insert":"\n"}]}

References

{"ops":[{"insert":"RAHMAN F, WANG N, YIN X, ELLINOR PT, LUBITZ SA, LELORIER PA, MCMANUS DD, SULLIVAN LM, SESHADRI S, VASAN RS, BENJAMIN EJ, MAGNANI JW. Atrial flutter: Clinical risk factors and adverse outcomes in the Framingham Heart Study. Heart Rhythm [online] 2016 Jan, 13(1):233-40 [viewed 15 November 2019] Available from: http:\/\/www.ncbi.nlm.nih.gov\/pubmed\/26226213"},{"insert":"\n","attributes":{"list":"ordered"}},{"insert":"BUTT\u00e0 C, TUTTOLOMONDO A, DI RAIMONDO D, MILIO G, MICELI S, ATTANZIO MT, GIARRUSSO L, LICATA G, PINTO A. Supraventricular tachycardias: proposal of a diagnostic algorithm for the narrow complex tachycardias. J Cardiol [online] 2013 Apr, 61(4):247-55 [viewed 15 November 2019] Available from: http:\/\/www.ncbi.nlm.nih.gov\/pubmed\/23473762"},{"insert":"\n","attributes":{"list":"ordered"}}]}

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