A middle-aged lady had EPS for several episodes of palpitations, An EP trace during RF ablation is shown:

What is inferred from this tracing?

A 37 y/o male patient presented to the ER with prolonged weakness, episodes of chills, fever and dyspnea from 1 month ago and headache during the last weak.
his PMH was unremarkable but in physical examination signs of multiple intra venous injections were obvious. 

below you can find his chest and brain CT scan and echocardiogram 

Besides initiation of antibiotics, what is the best choice? 

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 young patient came with palpitations and narrow complex tachycardia, 12 lead ECG is shown below:

What is the most probable diagnosis?

During electrophysiology study, arrhythmia is easily induced with atrial burst pacing. You can find the tracing in below.

what is the correct statement?

A young man was referred to the ED after experiencing syncope during exercise. He was unresponsive upon arrival. Below are the ECGs obtained during resuscitation and at rest.

What is the most probable diagnosis?

A 61 y/o female came to out patient clinic complaining about recent dyspnea of exertion.She was obese and had history of poor controlled HTN.Electrocardiogram is shown in figure1. We performed echocardiography which was normal except for moderate LVH and increased LA filling pressure (e/e':15).SPECT MPI scan  revealed moderate ischemia in inferobasal, inferolatral and inferoseptal walls.Then we perform CAG which the result is shown below.

In this contex which statement goes true for the shown angiography?

A 51-year-old man with no known coronary risk factors presented to the emergency department (ED) with a four-day history of chest pain.

Based on the patient’s ECG findings, which of the following is the most appropriate next step?

A 68-year-old male, cigarette smoker, presented with dizziness and dyspnea.
here there are the ECG of the patient's arrival and the ECG in the course of admission.

Which statement is correct?

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?

Analysis of the Case 587 is shown below:

device mode: DDD

upper tracking rate: 130/min

mode switch: on  if Atrial rate > 180  ----> mode switch to DDI ( Base Rate: 80/min )

Atrial and ventricular lead sensitivity and threshold and impedances were normal.

Knowing analysis, what is happening and what is the most probable diagnosis?

A 75 years old man came to the clinic with a complaint of dyspnea on exertion, ECG is shown below:

Based on ECG what would be expected in echocardiography?

A 60 years old male with pmh of CRT-D implantation last year,presented with this ECG. he had episodes of dizziness.
the ECG and CXR are shown below.

Which statement is correct?

A 34 y/o man came to ED complaining of retrosternal chest pain  which was started 2 hours ago & lasted one hour .He was mentioned an episode of heavy weight lifting the day before. He had no known coronary artery disease risk factor in his past medical history.

two sets of troponin was sent:

1st hs-cTnT=80 ng/L(upper limit<24 ng/l)

2nd hs-cTnT=84 ng/L(upper limit<24 ng/l)

so he was undergone coronary angiography with diagnosis of NSTEMI

what is your most likely diagnosis for this patient?

A middle-aged patient came to ED for an ICD shock. The tracing of shock delivery is shown:

what is your interpretation?

A 35 y/o man with history of Tetralogy of Fallot surgery in childhood underwent Echocardiography for routine follow up:

Which one of the following was not seen in this Echocardiography?

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

Which statement is WRONG?

A 72‑year‑old woman with a history of type 2 diabetes mellitus, ischemic heart disease, and end-stage renal disease on routine hemodialysis presents to the emergency department with malaise, generalized weakness, and nausea since last night.

On arrival:

• Blood pressure: 100/60 mmHg

• Pulse: 26 bpm, regular

• She appears fatigued but arousable.

Her ECG is provided.

What is the most appropriate immediate next step in management?

A 56-year-old male was referred for an arrhythmia. Here you can find the 24h ECG Holter.

The patient had no complaint of palpitation.

What is the best diagnosis?

An elderly woman with a history of a dual-chamber permanent pacemaker (PPM) from years ago presented with complaints of dizziness. The accompanying ECG and device tracing are provided for further evaluation.

Given the device tracing, which plan would be more suitable?