Notes in 01_Understanding and Reading ECG

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Published	02/10/2024	ARIBAR?!° A = {{c1::Any electrical activity}}° R = {{c1::Rate}}° I = {{c1::Irregular or regular}}° B = {{c1::Broad or narrow QRS complexes}}…
Published	02/10/2024	To draw the cardiac axis, remember the limb leads {{c1::(I, II, III, aVF, AVR, AVL)}} and the precordial leads {{c1::(V1-V6)}}
Published	02/10/2024	Drawing the Cardiac Axis: Location of Leads I = {{c1::the baseline (i.e. the X axis)}} II = {{c1::the heart’s direction}} III = {{c1::opposite to II o…
Published	02/10/2024	The net direction of electrical activity (i.e. the vector) determines whether the deflection on the ECG is {{c1::positive/upwards}} or {{c1::negative/…
Published	02/10/2024	On an ECG, the duration of one small square (i.e. 1 mm) is {{c1::0.04s}}
Published	02/10/2024	On an ECG, the duration of one large square (i.e. 5 mm) is {{c1::0.2s}}
Published	02/10/2024	On an ECG, {{c1::P waves}} represent {{c2::atrial depolarisation}} with a duration of {{c2::<0.12s}}
Published	02/10/2024	On an ECG, {{c1::QRS complex}} represents {{c2::ventricular depolarisation}} that takes {{c2::0.08-0.12s}} for transmission.
Published	02/10/2024	On an ECG, the {{c1::PR interval}} is the time from {{c2::atrial depolarisation}} to {{c2::ventricular depolarisation}}
Published	02/10/2024	On an ECG, the PR interval normally takes a duration of {{c1::0.12-0.2s}} for transmission
Published	02/10/2024	On an ECG, {{c1::T wave}} represents {{c2::ventricular repolarisation}}
Published	02/10/2024	On an ECG, the {{c1::QT interval}} is the time from {{c2::ventricular depolarisation}} to {{c2::ventricular repolarisation}}
Published	02/10/2024	On an ECG, the QT interval takes {{c1::0.42s}} for trasmission at 60 bpm
Published	02/10/2024	Systematic Approach to ECGRemembered as {{c1::RRACR}}{{c1::Rate}}{{c1::Rhythm}}{{c1::Axis}}{{c1::Characteristics}}{{c1::Relationship}}
Published	02/10/2024	Summary of Systematic Approach to ECGRemembered as RRACRRate is the number of times the heart beats (normal, tachycardia, bradycardia) that is ca…
Published	02/10/2024	Summary of Systematic Approach to ECGRemembered as RRACRRhythm is {{c1::the pattern of QRS complexes which can be regular or irregular. This can …
Published	02/10/2024	Summary of Systematic Approach to ECGRemembered as RRACRAxis is {{c1::the direction of the electrical current of the heart which is normally&nbsp…
Published	02/10/2024	Summary of Systematic Approach to ECGRemembered as RRACRCharacteristics describes looking at the following features of the ECG to assess for path…
Published	02/10/2024	Summary of Systematic Approach to ECGRemembered as RRACRRelationship describes looking at relation between {{c1::atrial activity (i.e. …
Published	02/10/2024	The normal axis of the heart is between {{c1::-30}} and {{c1::+90}} any deviation from that suggests pathology
Published	02/10/2024	Look at lead {{c1::I}} and lead {{c1::aVF}} to assess for deviation
Published	02/10/2024	{{c1::Left}} Axis Deviation shows a {{c2::positive}} lead I and {{c2::negative}} lead aVF
Published	02/10/2024	{{c1::Right}} Axis Deviation shows a {{c2::negative}} lead I and {{c2::positive}} lead aVF
Published	02/10/2024	When looking at P waves, the absence of P waves along with an irregularly irregular rhythm suggests {{c1::atrial fibrillation}}
Published	02/10/2024	When looking at P waves, a sawtooth appearance indicates {{c1::atrial flutter}}
Published	02/10/2024	A shortened PR interval (<0.12 sec) with delta wave (slurred upstroke to R wave) suggests {{c1::Wolf Parkinson White Syndrome}}
Published	02/10/2024	A prolonged PR interval (>0.2 sec) or Progressive PR interval increase and/or missed QRS complexes suggests {{c1::Atrioventricular block}…
Published	02/10/2024	A {{c2::tall}} QRS complex may indicate {{c1::left ventricular hypertrophy}}
Published	02/10/2024	Changes in ST segment such as ST segment elevation suggests {{c1::STEMI}} or {{c1::Pericarditis}}
Published	02/10/2024	Changes in ST segment such as ST segment depression most commonly indicate {{c1::NSTEMI}}
Published	02/10/2024	{{c2::Tall/Tented}} T waves suggest {{c1::hyperkalaemia}}
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