Term
| A WAVE OF DEPOLARIZATION MOVING TOWARDS THE + ELECTRODE CAUSES WHAT DEFLECTION? |
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Definition
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Term
| A WAVE OF REPOLARIZATION MOVING TOWARDS THE + ELECTRODE CAUSES WHAT DEFLECTION? |
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Definition
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Term
| A WAVE OF DEPOLARIZATION MOVING TOWARDS THE - ELECTRODE CAUSES WHAT DEFLECTION? |
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Definition
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Term
| A WAVE OF REPOLARIZATION MOVING TOWARDS THE - ELECTRODE CAUSES WHAT DEFLECTION? |
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Definition
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Term
| WAVES OF DEPOLARIZATION AND REPOLARIZATION THAT MOVE PERPENDICULAR TO THE IMAGINARY LINE CONNECTING THE ELECTRODES CAUSE WHAT KIND OF DEFLECTION? |
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Definition
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Term
| HOW DOES THE SA NODE DEPOLARIZE? |
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Definition
| EVERY MYOCYTE IS LINKED TO EVERY OTHER MYOCYTE VIA GAP JUNCTIONS. WHEN ONE CELL DEPOLARIZES, WHEN POSITIVE CHARGE COMES IN THE SA NODE, IT IS GOING TO DEPOLARIZE ITS NEIGHBORING CELLS. |
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Term
| WHY CAN WE THINK OF THE RIGHT AND LEFT ATRIA AS BEING ONE CELL? |
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Definition
| I CAN MAKE MY WAY COMPLETELY THROUGH, CELL TO CELL, ALL THE WAY THROUGH THE LATERAL ATRIA WALL WITHOUT EXITING THROUGH THE PLASMA MEMBRANE. |
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Term
| BETWEEN THE "ATRIA" AND "VENTRICLE" CELL IS KNOWN AS WHAT IN RELATION TO WHERE THE VALVES ARE? |
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Definition
| THE VALVES ARE EMBEDDED IN A CONNECTIVE TISSUE RING CALLED THE FIBROUS TRIGONE. IT IS NON-CONDUCTIVE CONNECTIVE TISSUE. |
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Term
| WHAT IS THE ONLY WAY ELECTRICAL ACTIVITY CAN MOVE FROM THE ATRIA TO THE VENTRICLES? |
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Definition
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Term
| WHERE IS THE SA NODE LOCATED AT? |
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Definition
| IN SUPERIOR POSTERIOR RIGHT ATRIAL WALL |
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Term
| WHERE IS THE AV NODE LOCATED AT? |
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Definition
| INFERIOR PORTIONS OF THE INTERATRIAL SEPTUM (THE SEPTUM BETWEEN THE RIGHT AND LEFT ATRIA BELOW THE FOSSA OVALIS). |
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Term
| WHERE IS THE FORAMEN OVALE AND WHAT IS IT CALLED IN THE ADULTS. |
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Definition
| THE FORAMEN OVALE IN UTERO IS A HOLE BETWEEN THE RIGHT AND LEFT ATRIA THAT ALLOWS BLOOD TO BYPASS THE PULMONARY CIRCUIT. IN THE INTERATRIAL SEPTUM I HAVE IN UTERO A FORAMEN OVALE. WHICH BECOMES IN ADULTS THE FOSSA OVALIS. |
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Term
| WHERE IS THE DUCTUS ARTERIOSUS IN UTERO AND WHAT IS IT CALLED IN THE ADULT? |
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Definition
| IT CONNECTS THE PULMONARY ARTERY AND AROTIC ARCH. IN ADULTS IT BECOMES THE LIGAMENTUM ARTERISUM. BLOOD IS GOING TO PASS FROM THE PULMONARY ARTERY INTO THE AORTIC ARCH IN UTERO. |
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Term
| WHAT IS A PDA AND WHERE DOES BLOOD GO? |
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Definition
| PATENT DUCTUS ARTERIOSUS. IF I GET A PDA BLOOD IS EJECTED IN THE AORTA IS NOT GOING TO GO TO THE SYSTEMIC CIRCUIT. IT IS GOING TO GO INTO THE PULMONARY CIRCUIT. |
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Term
| WHERE DOES THE AV NODE PROJECT THROUGH? |
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Definition
| THE AV NODE IS BELOW THE FOSSA OVALIS, IN THE INTERATRIAL SEPTUM, PROJECTING THROUGH THE FIBROUS TRIGONE. |
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Term
| LIST THE WAYS OF HEART CONDUCTION. |
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Definition
| SA NODE, TO AV NODE, PROJECTING THROUGH THAT ELECTRICAL INSULATOR IS NOT THE BUNDLE OF HIS, THE ATRIOVENTRICULAR BUNDLE. I AM NOT IN THE INTERVENTRICULAR SEPTUM, I BIFURCATE IN TO RIGHT AND LEFT BUNDLE BRANCHES. WHEN I GET TO THE APEX OF THE HEART THAT COMES BACK UP THE LATERAL WALLS AND GIVES RISE TO THE PURKINJE FIBERS. |
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Term
| DESCRIBE THE WAVE OF DEPOLARIZATION. |
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Definition
| IT IS RELATED TO ONE ATRIAL CELL AND ONE VENTRICLE CELL BECAUSE THEY ARE ALL CONNECTED BY GAP JUNCTIONS. THE WAVE OF DEPOLARIZATION IS THE DIRECTION THE CELLS ARE DEPOLARIZING. MYOCYTES DEPOLARIZE AND REPOLARIZE AND WE HAVE A WAVE OF DEPOLARIZATION. |
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Term
| WHAT IS THE DIFFERENCE BETWEEN AN ELECTRODE AND A LEAD? |
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Definition
| ELECTRODES EXIST. LEADS DO NOT EXIST. THEY ARE IMAGINARY LINES BETWEEN ELECTRODES. |
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Term
| DESCRIBE THE WAVE OF DEPOLARIZATION THAT TRAVELS PARALLEL WITH THE LEAD TOWARD THE POSITIVE SIDE AND THEN AGAIN AT 45 DEGREE ANGLE AWAY FROM IT. |
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Definition
| IF IT TRAVELS IN PARALLEL WAY IT WILL GIVE A MAXIMAL DEFLECTION IN THAT LEAD. FOR THE 45 DEGREE ANGLE IT IS GOING TO HAVE HALF AS MUCH AMPLITUDE. IT IS STILL POSITIVE DEFLECTION BUT WE SEE ONLY HALF THE AMPLITUDE. |
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Term
| WHAT 2 THINGS DOES VECTORS HAVE? |
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Definition
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Term
| WHAT WAVE IS OF DIFFERENT AMPLITUDES ON A 12 LEAD EKG? |
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Definition
| THE R WAVE. IT IS BECAUSE YOU ARE LOOKING AT IT IN DIFFERENT DIRECTIONS. AS FAR AS THE ANGLE AND THE DEFLECTION OF THE WAVE. |
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Term
| WHAT ARE THE INTRINSIC FIRING RATES OF THE SA NODE, ATRIAL CELLS, AV NODE, BUNDLE OF HIS, BUNDLE BRANCH, PURKINJE FIBERS, AND MYOCARDIAL CELLS? |
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Definition
| SA NODE 60-100, ATRIAL CELLS 55-60, AV NODE 45-50, BUNDLE OF HIS 40-45, BUNDLE BRANCH 40-45, PURKINJE FIBERS 35-40, AND MYOCARDIAL CELLS 30-35. |
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Term
| WHERE DOES THE ELECTRICAL CONDUCTION SYSTEM BEGIN AT? |
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Definition
| THE SA NODE. IT IS USUALLY LESS THAN THAT BECUASE WE HAVE PARASYMPATHETIC AND SYMPATHETIC INFLUENCES THAT ARE GOING TO REGULATE THAT. |
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Term
| WHAT IS THE SLOPE OF PHASE 4 OF THE AV NODE? |
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Definition
| IT WOULD BE DECREASED BECAUSE IT HAS A SLOWER RATE. THE AV NODE HAS A SLOWER INTRINSIC FIRING RATE BECAUSE THE SLOPE OF PHASE 4 OF THE AV NODE IS LESS. |
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Term
| WHAT ELECTRICAL PATHWAY TAKES OVER IS THE BUNDLE OF HIS GETS WIPED OUT? |
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Definition
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Term
| WHY IS A JUNCTIONAL RHYTHM SLOWER THAN A SINUS RHYTHM? |
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Definition
| THAT IS BECASUE OF THE SLOW INTRINSIC RATE OF THE AV NODE IS DECREASED. IT HAS NOTHING TO DO WITH THE PARASYMPATHETIC NERVOUS SYSTEM. THAT IS INTRINSIC. IT IS A FUNCTION OF THE AV NODE. |
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Term
| WHY DOES THE AV NODE CAUSE A DELAY IN CONDUCTION? |
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Definition
| IT ALLOWS THE ATRIA TIME TO DEPOLARIZE (THEY HAVE ALREADY DEPOLARIZE BY THE TIME THE AV NODE GETS THE SIGNAL BUT THEY HAVE NOT CONTRACTED). IT AFFORDS THE ATRIA ENOUGH TIME TO CONTRACT BEFORE THE SIGNAL GETS SENT DOWN INTO THE VENTRICLE TO FORCE THEM TO CONTRACT. IF THE DELAY WASNT THERE THE ATRIA AND VENTRICLES WOULD CONTRACT SIMULTANEOUSLY AND MY ATRIAL KICK WOULD BE LOST. SO THE AV NODE DELAY IS PARTLY IS BECAUSE IT ALLOWS US TO COMPLETE THE ATRIAL CONTRACTION BEFORE THE VENTRICLES EVER GET THE SIGNAL TO CONTRACT. |
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Term
| WHAT DOES THE BUNDLE OF HIS BIFURCATE INTO AND WHERE IS THIS LOCATED AT? WHAT DO THEY FURTHER BIFURCATE INTO? |
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Definition
| RIGHT AND LEFT BUNCH BRANCH. THEY ARE BOTH FOUND IN THE INTERVENTRICULAR SEPTUM. THE LBB WILL FURTHER BIFURCATE INTO A POSTERIOR AND AN ANTERIOR BRANCH, THIS IS BECAUE IF WE COMPARE THE MUSCLE MASS OF THE RIGHT VENTRICLE TO THE LEFT. I HAVE A LOT MORE MYOCYTES ON THE LEFT SIDE THAT NEEDS THE SIGNAL MORE THAN THE RIGHT. |
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Term
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Definition
| THEY DEAL WITH THE BLOCKING OF EITHER THE ANTERIOR OR THE POSTERIOR FASCILE. |
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