Heart facts Heart pumps over 2,500 gallons per day ¼ cup per beat
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1 Heart facts Heart pumps over 2,500 gallons per day ¼ cup per beat 70-75 beats per minuteOver 60,000 miles of blood vessels
2 1. What type of view is this? Name this gland.3. Name 2 hormones secreted by this gland.4. Name this gland5. What are the effects of the hormonesecreted by this gland?
3 Heart outline pulmonary & systemic circulation location of heart in thoraxpericardiumfibrous skeletonexternal anatomy of heartinternal anatomy of heartcoronary circulationCAD, angina and heart attacksheart valvesconduction system of heartEKG’scardiac muscle
26 Myocardial infarction (MI) dead tissue areas in myocardiumcaused by interruption of blood flowcardiac muscles cells don’t regeneratereplaced by scar tissueAngina pectoris (chest pain)scarred or ischemic cardiac muscle can’t pump or conduct electrical impulsesarrhythmias (ventricular fibrillation)
27 Referred pain:Organ & skin pain fibers travel to the spinalcord togetherOrgan pain misinterpreted as skin pain(referred pain)
28 Aortic valve(semilunar valve)Pulmonary valve(semilunar valve)Bicuspid or MitralvalveTricuspid valve
29 Atrioventricular (AV) valves Semilunar valvesaortic & pulmonary valveseach has 3 cusps (no tendinous cords)close when pressure in ventricles fallsAtrioventricular (AV) valvestricuspid and bicuspid (Mitral)tricuspid = 3 cusps, bicuspid = 2connected to papillary muscle via tendinous cordsclose when pressure in ventricles increases
35 What are the ventricles doing in A? Valve Function ReviewABWhat are the ventricles doing in A?What are the ventricles doing in B?
36 Cardiac Cycle = 1 heartbeat How does the heart beat?Cardiac Cycle = 1 heartbeat
37 Conduction System of Heart SA node – AV node – AV bundle of His (between ventricles) – Purkinje fibersHow does your heart rate change?Nervous control (ANS)hormonesdrugsHeart block: electrical signals blockedArrhythmia: irregular heart beatFibrillations: uncoordinated contractions
38 EKG = electrocardiogram Recording electrical currents in heartP waveatrial contractionP to Q intervaltime for impulse to travel from SA node to AV nodeQRS complexventricular contractionT waveventricular relaxation
39 Heart failure Impairment of the heart to fill or pump a sufficient amount of blood throughthe bodyright sideperipheral edemaascitesjugular venous distentionleft sidedyspnea (shortness of breath)orthopneapulmonary edema