Notes in 04 ECG Theory and Interpretation

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Status	Last Update	Fields
Published	10/12/2023	The {{c1::P wave}} on ECG represents {{c2::atrial depolarization}}
Published	10/12/2023	Atrial repolarization is not seen on an ECG because it is masked by the {{c1::QRS complex}}
Published	10/12/2023	The {{c1::PR interval}} on ECG is the time from the initial depolarization of the atria to the initial depolarization of the ventricles
Published	10/12/2023	The PR interval on ECG depends on the conduction velocity through the {{c1::AV node}}
Published	10/12/2023	The {{c1::QRS complex}} on ECG represents {{c2::ventricular depolarization}}
Published	10/12/2023	The {{c2::T wave}} on ECG represents {{c1::ventricular repolarization}}
Published	10/12/2023	T-wave inversion may indicate recent {{c1::myocardial infarction (MI)}}
Published	10/12/2023	The {{c1::QT interval}} on ECG represents the entire period of ventricular depolarization, contraction, and repolarization
Published	10/12/2023	The {{c1::ST segment}} on ECG is an isoelectric period (horizontal line) when the ventricles are depolarized
Published	10/12/2023	Which pacemaker in the heart has the fastest rate?{{c1::SA node (hence why it is dominant)}}
Published	10/12/2023	Atrial {{c1::systole}} is preceded by the {{c2::P}} wave on ECG, which marks depolarization of the atria
Published	10/12/2023	Wolff-Parkinson-White syndrome presents with a characteristic {{c1::delta}} wave on ECG
Published	10/12/2023	Wolff-Parkinson-White syndrome presents with a(n) {{c1::widened}} QRS complex and {{c1::shortened}} PR interval on ECG
Published	10/12/2023	{{c1::1st}} degree AV block is characterized by a PR interval > {{c2::200}} msec on ECG
Published	10/12/2023	{{c1::2nd degree Mobitz type I (Wenckebach)::(aka)}} AV block is characterized by progressive lengthening of the {{c2::PR}} interval until a beat is "…
Published	10/12/2023	2nd degree Mobitz type I AV block is characterized by a(n) {{c1::regularly}}, {{c1::irregular}} patterned rhythm on ECG
Published	10/12/2023	{{c1::2nd degree Mobitz type II}} AV block is characterized by dropped beats that are not preceded by a change in length of the PR interval on ECG
Published	10/12/2023	{{c1::3rd}} degree AV block is characterized by independent beating of the atria and ventricles (P waves and QRS complexes are not rhythmically associ…
Published	10/12/2023	What pathology is indicated on the ECG below? {{c1::1st degree AV block}}
Published	10/12/2023	What pathology is indicated on the ECG below? {{c1::2nd degree AV block, Mobitz type I (Wenckebach)}}
Published	10/12/2023	What pathology is indicated on the ECG below? {{c1::2nd degree AV block, Mobitz type II}}
Published	10/12/2023	What pathology is indicated on the ECG below? {{c1::3rd degree AV block}}
Published	10/12/2023	ECG changes associated with acute {{c4::pericarditis}} include widespread, diffuse {{c1::ST segment}} {{c2::elevation}} and/or {{c1::PR}} {{c2::depres…
Published	10/12/2023	QTc > {{c1::500}} ms is at increased risk for dangerous dysrhythmias
Published	10/12/2023	{{c1::Right bundle branch block::Condition}} may result in:
Published	10/12/2023	{{c1::Left bundle branch block::Condition}} may result in:
Published	10/12/2023	{{c1::RA enlargement::Condition}} may result in:
Published	10/12/2023	{{c1::LA enlargement::Condition}} may result in:
Published	10/12/2023	{{c1::LV hypertrophy::Condition}} may result in:
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Published	10/13/2023	Positive ECG deflections are caused by:depolarizing forces {{c1::towards}} the leadrepolarizing forces {{c1::away from}} the lead
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Published	10/12/2023	For rate of irregular rhythms, count total beats in a strip and multiply by {{c1::6}}
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Published	10/12/2023	Sinus Rhythm• {{c1::P}} before every QRS• {{c1::QRS}} before every P• All {{c2::P}} waves look the same• Normal {{c2::P}} wave axis (+ in {{c3::I, aVF…
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Published	10/12/2023	Which of the following is not a potential cause of heart blockCongenital Heart DiseaseIschemiaInfiltrative CardiomyopathyBeta Blockers (-olol)Stimulan…
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Published	10/12/2023	What is indicated in this ECG{{c1::Right ventricular hypertrophy}}
Published	10/12/2023	What is indicated in this ECG{{c1::Left Venctricular Hypertrophy}}
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Published	10/12/2023	Normal duration of a P wave?
Published	10/12/2023	Normal duration of a QRS complex?
Published	10/12/2023	Normally, the P-wave in lead II may be slightly asymmetric by having two humps. The 1st hump is {{c1::right::right/left}} atrial activation …
Published	10/13/2023
Published	10/16/2023	Brugada syndrome, long QT syndrome, and CPVT all follow an {{c1::autosomal dominant}} inheritance pattern
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