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Cerebral Blood Flow in Orthostatic Intolerance

Journal of the American Heart Association

Because CBF is not easy to measure, rises in heart rate or drops in blood pressure are used as proxies for abnormal CBF. These result in diagnoses such as postural orthostatic tachycardia syndrome and orthostatic hypotension.

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Tachycardia and hyperkalemia. What will happen after therapy with 1 gram of Ca gluconate and some bicarbonate?

Dr. Smith's ECG Blog

Blood pressure was 117/80, pulse 161, Resp 45, SpO2 100 on oxygen. Here is the 12-lead ECG: Wide complex tachycardia What do you think? His pulse on the monitor suddenly went down to 140 and another 12-lead ECG was recorded: Sinus tachycardia at a rate of 143 There are peaked T-waves typical of hyperkalemia The K returned at 6.9

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Ventricular Fibrillation, ICD, LBBB, QRS of 210 ms, Positive Smith Modified Sgarbossa Criteria, and Pacemaker-Mediated Tachycardia

Dr. Smith's ECG Blog

Then I always look to see if the initial deflection of the QRS has a lot of voltage change per change in time (seen in tachycardias that are initiated from above the ventricle because the propagate through fast conducting purkinje fiber. Tachycardia exaggerates ST Elevation in LBBB and Paced rhythm 5. Pacemaker mediated tachycardia!

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A young man with another episode of tachycardia. What is it? And why give adenosine in sinus rhythm?

Dr. Smith's ECG Blog

The ECGs show a wide complex, irregularly irregular tachycardia. His blood pressure was 118/96. At that time, he presented via EMS and had received magnesium and lidocaine prehospital for concerns of ventricular tachycardia. On arrival to the ED, he was noted to be in a wide complex tachycardia with a rate in the 240s.

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A young man with persistent palpitations

Dr. Smith's ECG Blog

Mentation and blood pressure were normal. But it is not disorganized enough to be polymorphic ventricular tachycardia. Learning Points: Wide complex irregularly irregular tachycardias include PMVT, AF with WPW, and AF with aberrancy. See our other cases of AF with WPW: A young man with another episode of tachycardia.

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A fascinating electrophysiology case. What is this wide complex tachycardia, and how best to manage it?

Dr. Smith's ECG Blog

She had a single chamber ICD/Pacemaker implanted several years prior due to ventricular tachycardia. Answer : The ECG above shows a regular wide complex tachycardia. Said differently, the ECG shows a rather slow ventricular tachycardia with a 2:1 VA conduction. Cardiac output (CO) was being maintained by the tachycardia.

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VT? Or Supraventricular tachycardic rhythm with aberrancy?

Dr. Smith's ECG Blog

On the monitor patient had wide-complex tachycardia. Differential is ventricular tachycardia versus supraventricular tachycardia with aberrancy versus sinus tachycardia with a aberrancy. After the patient was stabilized with supportive care, the heart rate gradually slowed, confirming sinus tachycardia.