Shared Flashcard Set

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Oct, 30 lecture
Part 1
28
Nursing
Graduate
10/31/2014

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Cards

Term
WHAT LAYER IS AFFECTED WITH SUBENDOCARDIAL ISCHEMIA?
Definition
ONLY THE INNER LAYER
Term
DESCRIBE TRANSMURAL ISCHEMIA.
Definition
REDUCTED O2 DELIVERY ACROSS THE VENTRICULAR WALL.
Term
DESCRIBE MYOCARDIAL INFARCTION.
Definition
MYOCARDIAL NECROSIS, CAUSED BY PROLONGED, SEVERE ISCHEMIA
Term
WHAT DOES THE ST SEGMENT AND T WAVE DO WITH MYOCARDIAL ISCHEMIA?
Definition
ST DEPRESSION WITH OR WITHOUT T WAVE INVERSION AS A RESULT OF ALTERED REPOLARIZATION
Term
WHAT DOES THE ST SEGMENT DO WITH MYOCARDIAL INJURY?
Definition
ST SEGMENT ELEVATION WITH OR WITHOUT LOSS OF R WAVE
Term
WHAT DOES MYOCARDIAL INFARCTION DO TO Q WAVES? WHAT IS IT RELATED TO?
Definition
MYOCADIAL INFARCTION CAUSES DEEP Q WAVES AS A RESULT OF ABSENCE OF DEPOLARIZATION CURRENT FROM DEAD TISSUE AND RECEDING CURRENTS FROM OPPOSITE SIDE OF HEART.
Term
CAN YOU GET ISCHEMIA IF YOU REDUCE THE FLOW, BUT THE O2 CONTENT IS NORMAL?
Definition
YES
Term
WHAT IS THE DIFFERENCE BETWEEN ISCHEMIA AND INFARCTION? CAN 1 OF THEM BE REVERESED?
Definition
ISCHEMIA CAN BE REVESED BY RESUMING FLOW OR OXYGEN SUPPLY. IF ISCHEMIA IS PROLONGED IT WILL RESULT IN INFARCTION.
Term
WHERE DOES ISCHEMIA ALWAYS BEGIN AT?
Definition
SUBENDOCARDIUM REGIONS
Term
WHY DOES THE ENDOCARDIUM ITSELF NOT BECOME NECROTIC?
Definition
D/T RICH O2 SUPPLY IN THE LUMEN IN THE LV. THERE IS A SMALL LAYER OF THE ENDOCARDIUM THAT GETS PERFUSED, ONLY A FEW LAYERS THICK.
Term
DESCRIBE THE WAVE FRONT PHENOMENON IN RELATION TO ISCHEMIA.
Definition
THE INNDER LAYERS WILL BECOMES ISCHEMIC, THEN THE MIDDLE LAYERS, AND THEN THE EPICARDIAL LAYERS. PROGRESSION OF ISCHEMIA STARTS AT THE SUB-ENDOCARDIUM AND PROGRESSES TO ALL LAYERS. THIS LEADS TO TRANSMURAL ISCHEMIA (ACROSS THE WALL ISCHEMIA/INFARCT).
Term
WHAT SURROUNDS THE AREA OF DEAD/NECROTIC TISSUE?
Definition
AREA OF INJURY (DAMAGED TISSUE).
Term
WHATIF NECROSIS IS IN THE MIDDLE, INJURY IS OUTSIDE OF THAT, WHAT IS OUTSIDE OF LEVEL OR INJURY?
Definition
ISCHEMIA
Term
WHAT WILL HAPPENS IF BLOOD FLOW REMAINS OCCLUDED IN THE AREA OR KNJURY?
Definition
IT WILL BECOME NECROTIC. GOES FROM ISCHEMIA, THEN DAMAGE, THEN INFARCT
Term
CAN INJURED MYOCARDIAL TISSUE REPAIR ITSELF? IF SO HOW LONG?
Definition
INJURED AREAS CAN REPAIR THEMSELVES IN DAYS TO WEEKS. IT IS DEPENDENT ON THE DEGREE OF INJURY. IF DAMAGES BEYOND REPAIR YOU HAVE INFARCT. THE ZONE OF INJURY WILL BECOME A HYPO-DYNAMIC OR WEAK AREA.
Term
WHAT ARE OSTIAS?
Definition
HOLES OR OPENING.
Term
DESCRIBE THE DISTANCE OF THE LEFT MAIN.
Definition
IT IS SHORT. WHEN IT REACHES THE LEFT ARTEIOVENTRICULAR SULCUS IT GIVES RISE TO THE CIRCUMFLED AND THE LEFT ANTERIOR DESCENDING
Term
WHAT 2 CORONARY ARTERIES ANASTOMOSE ON THE POSTERIOR SIDE?
Definition
THE CIRCUMFLEX AND RCA.
Term
IF THE MAJORITY OF THE POSTERIOR WALL IS SUPPLIED BY THE CIRCUMFLEX IT'S CALLED WHAT DOMINATE?
Definition
LEFT DOMINATE.
Term
PERFUSION OF THE ENTIRE HEAT OCCURS BY ___ BRANCHES THAT WILL COVER THE SURFACE OF THE HEART.
Definition
MARGINAL
Term
WHICH CORONARY ARTERY SUPPLIES THE AV NODE? WHAT DOES THAT ARTERY DIVIDE INTO?
Definition
LEFT CORONARY ARTERY. LAD SUPPLY VENTRICULAR SEPTUM AND PORTIONS OF THE ANTERIOR LEFT VENTRICULAR FREE WALL. THE CIRCUMFLEX SUPPLY THE LATERAL WALL AND POSTERIOR WALL OF THE LEFT VENTRICLE.
Term
WHICH MYOCYTES ARE THE LAT TO GET BLOOD?
Definition
SUBENDOARDIAL MYOCYTES THERFORE THEY WILL BE THE FIRST TO BECOME ISCHEMIC. MOVES LIKE A WAVE FRONT PHENOMENON
Term
WHICH MYOCYTES ARE EXPOSED TO GREATER EXTRAVASCULAR COMPRESSION?
Definition
SUB-ENDOCARDIAL VESSELS. ESPECIALLY DURING SYSTOLE.
Term
DURING DIASTOLE WHAT VESSELS ARE THE FIRST TO BE PERFUSED?
Definition
THE EPICARDIAL VESSELS
Term
WHAT ARE THE THEBESIAN VEINS RESPONSIBLE FOR?
Definition
THERE IS A SMALL AMOUNT OF BLOOD THAT EMPTIES IN THE LEFT VENTRICLE FROM THE VENTRICULAR MYOCYTES.
Term
DESCRIBE THE VENOUS AD-MIXTURE,
Definition
DUMPING DEOXYGENATED BLOOD INTO OXYGENATED LEFT VENTRICLE. THIS WILL LOWER THE O2 CONTENT. THE OTHER PLACE THIS IS FOUND IS THE BRONCHIAL CIRCULATION.
Term
DESCRIBE THE BRONCHIAL ARTERIES AND THE PULMONARY VEINS.
Definition
THE BRONCHIAL ARTERIES HAVE OXYGENATED BLOOD AND THEY WILL SUPPLY THE AIRWAYS (TUBES LEADING TO ALVEOLI). THE BRONCHIAL ARTERIES EMPTY INTO PULMONARY VEINS (WHICH IS OXYGENATED BLOOD). THERE YOU HAVE THE VENOUS AD-MIXTURE.
Term
WHAT IS THE A-a GRADIENT?
Definition
THE BIG A STANDS FOR ALVEOLUS, THE LITTLE a STANDS FOR ARTERIAL. IF THE ALVEOLI WERE TO PERFECTLY OXYGENATE THE BLOOD, THE LEFT VENTRICLE SHULD ONLY CONTAIN OXYGENATED BLOOD BUT IS NOT THE CASE B/C VENOUS AD-MIXTURE D/T THE A:a GRADIENT.
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