A middle-aged lady with a history of dual chamber pacemaker implantation 10 years ago, came to the emergency department, with a temporary pacemaker implanted, ECG after that is shown:

What is the best explanation for the ECG?

A 73 years old lady, history of CABG 5 years ago, consulted for this ECG to perform RF ablation,

What is your diagnosis and management?

A 71 year old patient with LVEF=35%, NECA, presented with this arrhythmia:

What is the arrhythmia?

A 58-year-old male with a history of AVR, underwent implantation of a dual-chamber pacemaker from the right side of the chest. At the time of implantation, before leads screwing (Attachment of Leads to Device header) and placing the pacemaker in the pocket , the atrial lead impedance was 650 ohms. After placing the pacemaker in the pocket, suturing, and dressing the wound, reprogramming was performed. This time, the atrial lead impedance was 1750 ohms. Chest X-rays of the patient during implantation and after implantation are available.

What is the most likely diagnosis?

According to case 641.

 What is the best plan for managing his arrhythmia?

17 years old girl, was referred for EP study due to episodes of palpitations. 

bellow you can find tracings of arrhythmia, which was induced during EPS.

What is the most probable diagnosis, and which electrophysiologic phenomena is happening?  

A 40 y/o man, with no previous PMH came to ED .He was referred by general practitioner for evaluation of AV block, the patient was asymptomatic and received no drugs.

The ECG was done during routine checkup.

What is your diagnosis and management?

a 42 year old male came to our ED with the chief complaint of palpitation, ECG of his arrhythmia and after adenosine injection is shown below : 

According to his ECG, which arrhythmia is not possible in this patient?

A Young man with recurrent palpitations underwent EP and ablation, Below you will find a tracing during RF ablation.

What is shown by tracing?

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?

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

What statement is False?

A young lady underwent EPS for palpitation, during ventricular pacing this arrhythmia happened.

What happened?

A 68-year-old man with a left ventricular ejection fraction (LVEF) of 25%, experiencing frequent premature ventricular contractions (PVCs) at a burden of 45%, and mild coronary artery disease (CAD). The 12-lead ECG is displayed below.

Which statement is FALSE?

A 50 y/o came to ED complaining of episodes of palpitation, his past medical history is otherwise unremarkable.

what is your most likely diagnosis for the patient?

45 years old man with recurrent palpitations, underwent EPS. Two EP tracings are shown below:

Which Arrhythmia is unlikely? 

A 75-year-old woman with a medical history of diabetes and hypertension, and a dual-chamber pacemaker, attended a follow-up appointment. Enclosed are ECG Holter tracings, a 12-lead ECG, and the device analysis for the patient.

Which statement is TRUE?

A 78 y/o woman came to ED complaining of acute onset of retrosternal chest pain, she was anxious and suffer from severe chest pain. In her past medical history she only had a history of hypertension.at admission to hospital her vital signs were as follow:

BP=160/60  HR=110 RR=22 O2sat in room air=96%

an ECG &bed side echocardiography was done immediately

According to ECG &echocardiography what is your next appropriate step?

A woman in her 60s underwent cryoballoon ablation for AF. Below are 3 consecutive EP tracings during LUPV cryoablation.

What is the best explanation for these tracings?

49 years old man underwent EPS ablation for atrial flutter, coronary angiography also performed. Below you can find a shot of angiography: 

What is the most probable diagnosis?

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?