A 34-year-old man came to our ED with the chief complaint of palpitation, here are two shots from the intracardiac EGM of his EP study :

What is the most probable diagnosis and the mechanism behind turning 2:1 arrhythmia to 1:1? 

A 57-year-old lady came to ER with chief complaint of dizziness since a week ago.
Here you can find her ECG,
the second ECG is taken after the administration of Atropine.

what is your diagnosis,and where is the level of the block?

Below you can find the 3D mapping ablation of case 564. 

What statement is False?

A middle-aged patient with a history of atrial septal defect (ASD) repair underwent an electrophysiology study (EPS) with Precision. Below, you can find the propagation and sparkle map.

What is the most probable mechanism of arrhythmia? 

A 25-year-old patient came to our clinic with the chief complaint of palpitation, based on his surface ECG, we scheduled him for EPS.

According to his surface ECG and EP tracing, which statement is not true?

A 55 years old male, with a history of slow pathway ablation 2 years ago, Presented with palpitation most often.

Here you can find his ECG.

Which statment is wrong?

A 36-year-old woman with a medical history of coronary artery bypass grafting (CABG) performed 2 years ago, insulin-dependent diabetes mellitus (DM), hyperlipidemia, and hypertension presented to the emergency department (ED) with complaints of fever and severe weakness lasting for 2 days. An electrocardiogram (ECG), displayed below, suggests the presence of Brugada syndrome. Additionally, while sitting on a chair in the ED, the patient experienced a syncopal episode. Consequently, the decision was made to admit the patient based on the syncope and ECG findings.

A coronary angiogram conducted 1 year ago revealed triple-vessel disease (3VD) and a patent left internal mammary artery (LIMA) graft on the left anterior descending artery (LAD). The posterior descending artery (PDA) demonstrated a patent saphenous vein graft (SVG), and there was significant diffuse stenosis observed in the SVG on the obtuse marginal (OM) branch, for which medical treatment was planned.

Troponin levels were negative upon presentation and remained so throughout the patient's admission.

Also, the ECG can be seen below.

Among the following measures, which one do you consider unnecessary?

A 54 years old man with a history of STEMI and primary PCI months ago presented with palpitations, Rest ECG and the arrhythmia ECG are shown : 

What is the most possible diagnosis?

A 30 y/o woman underwent echocardiography for evaluation of dyspnea. She claimed that her dyspnea worsens while lying on the left side.

What is the most likely diagnosis?

 You were on an on-call duty. The emergency department nurse paged you because of cardiac arrest at ED. The ECG of patient at arrival is shown:

Which one of the following statement is the most suitable diagnosis for this ECG?

54 years old woman was referred for electrophysiology study, due to multiple episodes of sudden palpitations. The arrhythmia was induced via atrial burst pacing.

Below you can find tracings of arrhythmia.

Which diagnosis is least possible?

A young patient underwent EPS for paroxysmal SVT, Parahisian Pacing maneuver is shown:

According to the result of this maneuver, what is the most probable Arrhythmia?

A 39-year-old lady with frequent palpitation, you can find ECG and EP tracings. 

What is the most probable diagnosis?

A 32-year-old male presents to the cardiology clinic with a history of palpitations and syncope. He reports that he has been experiencing these symptoms for the past six months, and they have been increasing in frequency and severity. He denies any chest pain or shortness of breath.

A transthoracic echocardiogram (TTE) reveals mild dilatation of the right ventricle (RV) with reduced RV function and an ejection fraction of 40%. The left ventricle (LV) is normal in size and function.

The EKG is shown.

Based on the diagnosis, which one is correct?

A 28 years old man with preexcitation and episodes of palpitations. ECG is shown below:

Regarding to accessory pathway location, what procedure related complication does not threat the patient?

A 45 years old electrician with a history of ICD implantation, experienced ICD shock. Below you can find plot diagram and EGM of the event. 

which statement is WRONG?

 A 52-year-old gentleman reffered for EP study, due to episodic palpitations and wide complex tachycardia requiring cardioversion in ER.

During EPS, the HV interval was  90 msec, and arrhythmia was induced with burst pacing.

Below you can find 12-lead ECG (during tachycardia, sinus rhythm ) and EP tracings.

What is the most probable diagnosis? 

A young lady with palpitations, surface ECG showed preexcitation. 

Where is the location of the accessory pathway?

A middle-aged patient with a history of ICD implantation complained about palpation. The ICD tracing is shown:

which statement is WRONG?

A patient with frequent palpitations underwent EPS you can see the EP tracing below:

What is the most probable diagnosis?