Term
| WHAT LAYER IS AFFECTED WITH SUBENDOCARDIAL ISCHEMIA? |
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Definition
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Term
| DESCRIBE TRANSMURAL ISCHEMIA. |
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Definition
| REDUCTED O2 DELIVERY ACROSS THE VENTRICULAR WALL. |
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Term
| DESCRIBE MYOCARDIAL INFARCTION. |
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Definition
| MYOCARDIAL NECROSIS, CAUSED BY PROLONGED, SEVERE ISCHEMIA |
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Term
| WHAT DOES THE ST SEGMENT AND T WAVE DO WITH MYOCARDIAL ISCHEMIA? |
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Definition
| ST DEPRESSION WITH OR WITHOUT T WAVE INVERSION AS A RESULT OF ALTERED REPOLARIZATION |
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Term
| WHAT DOES THE ST SEGMENT DO WITH MYOCARDIAL INJURY? |
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Definition
| ST SEGMENT ELEVATION WITH OR WITHOUT LOSS OF R WAVE |
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Term
| WHAT DOES MYOCARDIAL INFARCTION DO TO Q WAVES? WHAT IS IT RELATED TO? |
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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. |
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Term
| CAN YOU GET ISCHEMIA IF YOU REDUCE THE FLOW, BUT THE O2 CONTENT IS NORMAL? |
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Definition
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Term
| WHAT IS THE DIFFERENCE BETWEEN ISCHEMIA AND INFARCTION? CAN 1 OF THEM BE REVERESED? |
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Definition
| ISCHEMIA CAN BE REVESED BY RESUMING FLOW OR OXYGEN SUPPLY. IF ISCHEMIA IS PROLONGED IT WILL RESULT IN INFARCTION. |
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Term
| WHERE DOES ISCHEMIA ALWAYS BEGIN AT? |
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Definition
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Term
| WHY DOES THE ENDOCARDIUM ITSELF NOT BECOME NECROTIC? |
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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. |
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Term
| DESCRIBE THE WAVE FRONT PHENOMENON IN RELATION TO ISCHEMIA. |
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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). |
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Term
| WHAT SURROUNDS THE AREA OF DEAD/NECROTIC TISSUE? |
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Definition
| AREA OF INJURY (DAMAGED TISSUE). |
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Term
| WHATIF NECROSIS IS IN THE MIDDLE, INJURY IS OUTSIDE OF THAT, WHAT IS OUTSIDE OF LEVEL OR INJURY? |
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Definition
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Term
| WHAT WILL HAPPENS IF BLOOD FLOW REMAINS OCCLUDED IN THE AREA OR KNJURY? |
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Definition
| IT WILL BECOME NECROTIC. GOES FROM ISCHEMIA, THEN DAMAGE, THEN INFARCT |
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Term
| CAN INJURED MYOCARDIAL TISSUE REPAIR ITSELF? IF SO HOW LONG? |
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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. |
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Term
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Definition
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Term
| DESCRIBE THE DISTANCE OF THE LEFT MAIN. |
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Definition
| IT IS SHORT. WHEN IT REACHES THE LEFT ARTEIOVENTRICULAR SULCUS IT GIVES RISE TO THE CIRCUMFLED AND THE LEFT ANTERIOR DESCENDING |
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Term
| WHAT 2 CORONARY ARTERIES ANASTOMOSE ON THE POSTERIOR SIDE? |
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Definition
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Term
| IF THE MAJORITY OF THE POSTERIOR WALL IS SUPPLIED BY THE CIRCUMFLEX IT'S CALLED WHAT DOMINATE? |
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Definition
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Term
| PERFUSION OF THE ENTIRE HEAT OCCURS BY ___ BRANCHES THAT WILL COVER THE SURFACE OF THE HEART. |
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Definition
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Term
| WHICH CORONARY ARTERY SUPPLIES THE AV NODE? WHAT DOES THAT ARTERY DIVIDE INTO? |
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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. |
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Term
| WHICH MYOCYTES ARE THE LAT TO GET BLOOD? |
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Definition
| SUBENDOARDIAL MYOCYTES THERFORE THEY WILL BE THE FIRST TO BECOME ISCHEMIC. MOVES LIKE A WAVE FRONT PHENOMENON |
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Term
| WHICH MYOCYTES ARE EXPOSED TO GREATER EXTRAVASCULAR COMPRESSION? |
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Definition
| SUB-ENDOCARDIAL VESSELS. ESPECIALLY DURING SYSTOLE. |
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Term
| DURING DIASTOLE WHAT VESSELS ARE THE FIRST TO BE PERFUSED? |
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Definition
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Term
| WHAT ARE THE THEBESIAN VEINS RESPONSIBLE FOR? |
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Definition
| THERE IS A SMALL AMOUNT OF BLOOD THAT EMPTIES IN THE LEFT VENTRICLE FROM THE VENTRICULAR MYOCYTES. |
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Term
| DESCRIBE THE VENOUS AD-MIXTURE, |
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Definition
| DUMPING DEOXYGENATED BLOOD INTO OXYGENATED LEFT VENTRICLE. THIS WILL LOWER THE O2 CONTENT. THE OTHER PLACE THIS IS FOUND IS THE BRONCHIAL CIRCULATION. |
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Term
| DESCRIBE THE BRONCHIAL ARTERIES AND THE PULMONARY VEINS. |
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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. |
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Term
| WHAT IS THE A-a GRADIENT? |
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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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