A middle-aged male was found lying on the road. Ambulance transposrt was arranged and in the emergency they briefly could not find pulses, and gave a short period of CPR without shock was given. BP was 180/100, HR 130, Oxygen saturations 84%. He was intubated. A bedside ultrasound showed poor global function and B-lines of pulmonary edema. Here was the first ECG:

A 21 yrs old male patient presented with h/o fall unconscious on ground followed by muscle contraction of jaw , no h/o up rolling of eye ,tounge bite ,frothing ,fever ,trauma patient gained concious after 2 min but there is H/o post ictal confusion lasted for 1 hr cbc,lft ,rft,rbs -wnl ECG please give differential diagnosis

72 Female, presented with H/o Sudden onset LOC with vomiting and blurring of vision.no seizure. On exam, no focal deficit,Output normal..vision intact...possible diagnosis? Next line of investigation?? *History* CAD(DCMP - EF -44%) with HTN *Vitals* Bp -100/80,HR -68,Spo2 -98%,RR - 18 *Investigations* Urea -99,Creat -2.2,Pottasium -7.1 rest report normal

80yr old male patient with alleged h/o syncopial attack along with profuse sweating. Bp 130/90 epert advice on the case?

A 40–year-old man presents for evaluation after an episode of witnessed syncope while he was at work. He is a nurse who had been working long hours doing coronavirus disease 2019 testing outdoors on a hot summer day. He believes he may have been kneeling intermittently prior to his episode, but he is unsure. He complains of associated dizziness, diaphoresis, and a feeling of “tunneling.” There was no associated chest pain, palpitations, or exertion prior to the syncope episode. There was no witnessed seizure-like activity or loss of bowel or bladder control. He was able to regain consciousness within 1 minute and felt some fatigue thereafter. The patient has a medical history of hypertension. He has no surgical history. He is a lifelong nonsmoker, rarely drinks alcohol, and works as a nurse at a local hospital. He drinks 2 cups of coffee in the morning hours. His only medication is hydrochlorothiazide (HCTZ) 12.5 mg once daily. He does not use any over-the-counter medications or supplements. Vital Signs: Blood pressure: 130/80 mm Hg bilaterally supine, 120/75 mm Hg bilaterally 1 minute after sitting, and 100/65 mm Hg bilaterally 1 minute after standing; heart rate: 70(BPM) supine, 75 BPM 1 minute after sitting, and 90 BPM 1 minute after standing. Respiration rate: 18 breaths/minute; SpO2: 99% on room air; body mass index: 22 kg/m2 Physical Examination: Patient appears fatigued, is in no acute distress, and has no signs of trauma. He has normal S1 and S2 cardiac sounds, with absence of S3 and S4 sounds. There are no murmurs or rubs present. His apical impulse is not displaced. His neurologic examination is within normal limits, without focal neurological deficits. The patient’s 12-lead electrocardiogram (ECG) is as attached. Laboratory Studies: Complete Blood Count: White blood cells: 8.0 thousand/uL; hemoglobin: 14 g/dL; platelets: 300 thousand/uL Basic Metabolic Panel: Sodium: 140 mEq/L; potassium: 4.1 mEq/L; chloride: 100 mEq/L, carbon dioxide: 18 mEq/L; blood urea nitrogen: 29 mg/dL; creatinine: 1.1 mg/dL; calcium: 10 mg/dL; glucose: 78 mg/dL Thyroid Stimulating Hormone: 1.5 uIU/mL NT-proBNP (N-terminal Pro B-Type Natriuretic Peptide): 67 pg/mL. Troponin I: <0.02 What is the most likely cause of this patient’s syncope - A) Cardiac Dysarythmia B) CAD C)CAROTID SINUS SYNDROME D) ORTHOSTATIC HYPOTENSION