Archive | Cardiac Emergencies

Cardiac Emergencies | Chest Pain

Causes of chest pain – potentially life threatening problems Angina: Angina Pectoris is an intermittent attack of chest pain due to a reduction in blood flow to the heart muscle >>> exertion, stress, cold weather Stable Unstable Progressive Pre-infarction AMI: Acute Myocardial Infarction: death of an area of heart muscle due toblockage of blood flow […]

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Cardiac Emergencies | ECG Monitoring

Electrocardiographic Monitoring: a record of the electrical activity in the heart, transferred to the ECG machine and displayed or printed on paper Boxes on the paper represent time: .2 sec largest lines Positive impulses go upward, negative go downward Flatline: Isoelectric line is produced if no electrical impulse is present P-Wave: occurs first and represents […]

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Cardiac Emergencies | Electrophysiology

Electrophysiology Automaticity: self-generate electrical activity Excitability: respond to appropriate electrical stimulus Conductivity: transmits stimulus from cell to cell Contractility: Contract when stimulated by the appropriate electrical stimulus Regulation of heart function: comes partially from the brain (autonomic), from hormones if the endocrine system and from the heart tissue Barorecepters: sensory nerve endings that sense changes […]

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Cardiac Emergencies | Inherent Pacemakers

Inherent Pacemaker Rates of the Heart “Foci” or the focus: where electrical impulses start, Organized rhythm is required for perfusion Complexes: blocks of rhythms Isoelectric line: midline on an ECG, up is depolarizing, down in repolarizing Normal Sinus rhythm: (NSR) originates in the uppermost node, the SA (Sino Atrial)node, rate is usually between 60 and […]

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Cardiac Emergencies | General Overview

Epidemiology: Cardiovascular Disease is number 1 killer, approx. 2600 die each day, High BP, Coronary Heart Disease, AMI, Angina, Stroke, Rheumatic heart disease and CHF, 1 in 5 adults has some form. Risk Factors: Age: death rates rise with each year of life Family history: predisposition Hypertension: major risk factor BP>170/95 = 5 times higher […]

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