A middle-aged patient with wide complex tachycardia presented in ER. A rhythm strip and 12 lead ECG are shown below:

What is your diagnosis?

A 65 y/o man with history of MVR 2 years ago come to ED complaining of new onset dyspnea from 3 days ago.

Which statement is TRUE about the patient?

This ECG is taken during the ablation of case no.459, divided by a blue bar into two segments.

There are subtle changes in ECG, what is your diagnosis?

A 56-year-old man with palpitations and manifest preexcitation on surface ECG, referred for ablation.
ECGs  before and after full preexcitation are shown.

Where is the most likely location of the accessory pathway? 

A 34 y/old women admitted with fever, weakness and malaise from 3 weeks ago and 4 Kg 
weight loss from 1 month ago, She had a dental procedure 45 days ago, took Amoxicillin 500 mg TD
BP: 138/112   HR: 91RR: 22  T: 37.6 SaO2: 96% 
Mild splenomegaly detected ,WBC:12700 PMN:78% CRP ++ ESR :56

Echocardiography is shown:

What is the most probable diagnosis?

A 60-year-old lady with the complaint of syncope, two ECGs are shown:

which statement is FALSE?

A young man with frequent PVC. Below are 3 signals from RVOT, Distal CS, and RCC. 

Which signal do you think is the success signal?

35 y/o man underwent echocardiography for evaluation of nocturnal chest pain. Echocardiography is shown:

Based on the echocardiography, which one is NOT seen in this patient?

65 years old lady with complains of dizziness and palpitations and syncope. Three ECG tracings are shown:

What is the most probable diagnosis?

A 77 y/o man presented with TCP & diaphoresis from the last day, He is an active smoker.

Lab data: Trop:598 /cr:1 /Hb:13.5 /CRP:1.26 /PLT: 175000 /k:4.6

ECG: NSR, NAX No significant ST-T changes

Echo: LVEF=35%  with significant RWMA in ant circulation. No lv clot 

Coronary Angiography is shown:

What is the most common etiology of this condition? What is the most common manifestation?

A 67-year-old man with a history of frequent palpitations underwent EPS. Below you can find two tracings.

Which statement is WRONG?

Below is a video showcasing an episode of tachyarrhythmia recorded by an ICD in a middle-aged man.

What statement is WRONG about this tachycardia episode?

A 60 years old man with sustained arrhythmia and low LVEF (ECG below) underwent EPS and RF ablation, propagation mapping of right atrium and ECG is shown: 

In regard to ECG and propagation mapping of RA, what is the possible arrhythmia?

A 50 years old lady with history of unsuccessful RF ablation underwent EP, Arrhythmia was easily inducible with programmed stimulation, below you can see surface ECG, Entrainment maneuver and also 3D mapping with precision:

What is the mechanism of arrhythmia?

50 y/o woman with history of dyspnea on exertion underwent catheterization.

According to video of her catheterization & your presumptive diagnosis for her procedure can you guess which chamber is enlarged?

A 31 years old woman presented with paroxysmal palpitation.here there is her ECG Holter.

Which statement is NOT correct?

A 72-year-old male with a history of CABG 10 years ago and PPM-DR implantation last year due to CHB presented to the ER with a chief complaint of fatigue and dizziness persisting for the past month. Bedside echocardiography revealed an ejection fraction (EF) of 30-35%, moderate mitral regurgitation (MR), and no pericardial effusion.

Based on the ECG findings, what underlying condition or situation could be LESS responsible for these symptoms?

A 72-year-old man with a known history of Parkinson’s disease presented to our ED with a chief complaint of palpitations. Below is the intracardiac EGM from his EP study.

What is the diagnosis, and what is the most likely mechanism behind the variation in Tachycardia Cycle Length (TCL)?

A 79 years old patient with frequent palpitations. ECG Holter tracings and EP tracings are shown:

What is the most possible diagnosis?

Below are the electrophysiological (EP) tracings of a 42-year-old patient presenting with the primary complaint of palpitations:

Which statement is FALSE?