Notes in 22 Cardiac Rhythms

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Status	Last Update	Fields
Published	12/13/2023	Patients with beta blocker overdose that have refractory hypotension (e.g. to atropine, IV fluids) should be started on IV {{c1::glucagon}}
Published	12/13/2023	Cardioversion in atrial fibrillation > 48 hours requires {{c1::TEE::diagnostic test}} and {{c1::anticoagulation::pharm}}
Published	12/13/2023	Atrial systole is responsible for about {{c1::20-30%}} of the cardiac output.
Published	12/13/2023	2nd degree AV block, type I is a problem of the {{c1::AV node}}
Published	12/13/2023	What type of MI causes a right axial deviation?{{c1::Lateral Wall MI}}
Published	12/13/2023	In a {{c2::right}} axial deviation:Lead I is {{c1::-}}Lead II is {{c1::+}}
Published	12/13/2023	What type of MI causes a left axial deviation?{{c1::Inferior wall MI}}
Published	12/13/2023	What anatomical abnormalities cause a left axial deviation?{{c1::LV hypertrophyHorizontal heart}}
Published	12/13/2023	On an EKG, the absolute refractory period lasts from the {{c1::beginning of the QRS}} to the {{c1::peak of the T-wave}}.
Published	12/13/2023	On an EKG, the relative refractory period lasts from the {{c1::peak of the T-wave}} to the {{c1::end of the T-wave}}.
Published	12/13/2023	{{c1::Hypo}}kalemia can prolong the QT interval.
Published	12/13/2023	Class {{c1::IA}} and {{c1::III}} antiarrhythmic drugs can cause torsades de pointes.
Published	12/13/2023	Adenosine dose:{{c1::6}} mg rapid IV push → repeat with {{c1::12}} mg if ineffective
Published	12/13/2023	The His bundle, bundle branches, and purkinje fibers demonstrate {{c1::fast}} conduction velocity. .
Published	12/13/2023	The SA and AV nodes demonstrate {{c1::slow}} conduction velocities.
Published	12/13/2023	PVCs that land during the {{c2::relative refractory}} period can precipitate {{c1::R-on-T phenomenon}}.
Published	12/13/2023	The normal cardiac conduction system is:{{c1::SA node}} → {{c1::AV node}} → {{c1::bundle of His}} → {{c1::bundle branches}} → {{c1::purkinje fibers}}
Published	12/13/2023	A re-entry circuit is broken by {{c1::slowing conduction velocity}} or {{c2::increasing the refractory period}}.
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