CongestiveHeartFailure.ppt

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Congestive Heart Failure Congestive Heart Failure Definition Impaired cardiac pumping such that heart is unable to pump adequate amount of blood to meet metabolic needs  CHF Not a disease but a “syndrome” Associated with long-standing HTN and CAD Factors Affecting Cardiac Output Preload Cardiac Output = Heart Rate X Stroke Volume Afterload Contractility
  Congestive Heart Failure   Impaired cardiac pumping such that heart is unable to pump adequate amount of blood to meet metabolic needs   CHF   Not a disease but a “ syndrome ”  Associated with long-standing HTN and CAD Congestie Heart Failure Definition  Factors Affecting Cardiac Output Cardiac OutputPreloadAfterloadContractilityHeart RateStroke Volume=X   Heart Rate  In general, the higher the heart rate, the lower the cardiac  E.g. HR x ! CO  #$%&in x '$ &l ('$$ &l%&in )(.' *%&in+  $%&in x '$ &l -#$$ &l%&in )-.# *%&in+  ut onl/ up to a point. 0ith excessi1el/ high heart rates, diastolic filling ti&e 2egins to fall, thus causing stro3e 1olu&e and thus CO to fall Factors Affecting Cardiac !utput
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