Term
| DESCRIBE THE GAP FROM THE AV NODE TO BEGINNING OF THE Q WAVE. |
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Definition
| THAT IS WHEN THE AV NODE IS HANGING ON TO THE SIGNAL SO THE ATRIA CAN CONTRACT BEFORE THE VENTRICLES. |
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Term
| WHAT WAVE DO YOU SEE WITH SEPTAL DEPOLARIZATION? WHAT TYPE OF DEFLECTION DO YOU SEE. WHAT DOES IT FOLLOW? IS IT SEEN IN ALL LEADS? |
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Definition
| Q WAVE. SMALL INITIAL DOWNWARD DEFLECTION. FOLLOWS AV NODAL DEPOLARIZATION. IT IS NOT SEEN IN ALL LEADS. |
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Term
| THE FLAT LINE BETWEEN THE AV NODE AND THE Q WAVE IS WHAT? |
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Definition
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Term
| WHEN THE Q WAVE STARTS WHAT CONDUCTION POINT ARE YOU AT? |
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Definition
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Term
| WHICH WAY IS THE VECTOR POINTED WITH SEPTAL DEPOLARIZATION? |
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Definition
| TO RIGHT AND DOWNWARD. AFTER BRIEF DELAY AT AV NODE, IMPULSE TRAVERSES COMMON BUNDLE OF HIS AND RIGHT AND LEFT BUNDLE BRANCHES, AND THEN ENTERS INTERVENTRICULAR SEPTUM. |
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Term
| WHAT DOES SEPTAL DEPOLARIZATION RESULT IN LEAD I AND LEAD AVF? |
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Definition
| SMALL NEGATIVE DOWNWARD DEFLECTION IN LEAD I (Q WAVE) AND POSITIVE UPWARD DEFLECTION IN LEAD AVF (R WAVE). |
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Term
| WHICH BUNDLE BRANCH DEPOLARIZES BEFORE THE OTHER? |
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Definition
| THE LEFT BECAUSE IT IS BIGGER. THAT IS WHY THE VECTOR IS DOWNWARD AND TO THE RIGHT. TO MAKE SURE THAT THEY BOTH DEPOLARIZE AND CONTRACT AT THE SAME TIME SINCE THE LEFT HAS MORE MASS I NEED TO GET THE SIGNAL TO THE LEFT A LITTLE QUICKER THAN THE RIGHT. IF THEY DEPOLARIZE AT THE SAME TIME IT WOULD LOOK LIKE THE ARROW WOULD GO STRAIGHT DOWN THE MIDDLE. |
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Term
| WHY IS THE Q WAVE SO SMALL? |
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Definition
| THIS IS THE INTERVENTRICULAR SEPTUM, SMALL SMOUNT OF MUSCLE, WHICH MEANS THAT THE VECTOR IS GOING TO HAVE A SMALL MAGNITUDE. |
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Term
| LOOKING AT SEPTAL DEPOLARIZATION, WHICH LEAD WILL HAVE THE LARGEST Q WAVE? |
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Definition
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Term
| WHAT IS THE R WAVE A RESULT OF? |
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Definition
| VENTRICULAR APICAL DEPOLARIZATION. REPRESERNTS DEPOLARIZATION OF THE VENTRICULAR APEX. |
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Term
| WHAT IS THE FIRST POSITIVE DEFLECTION AFTER THE P WAVE? |
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Definition
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Term
| WHERE IS THE VECTOR POINTED TOWARDS WITH THE R WAVE? |
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Definition
| DOWNWARD AND TO THE LEFT. |
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Term
| WHAT DOES THE R WAVES DO IN LEAD I AND AVF? |
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Definition
| LARGE POSITIVE UPWARD DEFLECTION (R WAVE) IN LEAD I AND A BIGGER R WAVE IN LEAD AVF. |
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Term
| WHAT DOES THE S WAVE REPRESENT? |
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Definition
| VENTRICULAR BASAL DEPOLARIZATION. REPRESENTS DEPOLARIZATION OF THE VENTRICULAR BASE. |
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Term
| AS DEPOLARIZATION PROGRESSES OVER VENTRICLES, THE VECTOR SHIFTS TO BECOME DIRECTED WHERE? |
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Definition
| SUPERIORLY AND TO THE LEFT |
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Term
| WHAT DOES THE VENTRICULAR BASAL DEPOLARIZATION DO TO LEAD I AND AVF. |
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Definition
| EXTENDS UPWARD R WAVE IN LEAD I. CAUSES NEGATIVE DOWNWARD DEFLECTION (S WAVE) IN LEAD AVF. |
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Term
| DESCRIBE THE RIGHT VENTRICULAR BASAL DEPOLARIZATION. |
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Definition
| THE S WAVE IS VENTRICULAR BASAL DEPOLARIZATION. AGAIN I DO HAVE A SMALL RIGHT VENTRICULAR BASAL DEPOLARIZATION. BUT I HAVE A MUCH HARGER LEFT VENTRICULAR BASAL DEPOLARIZATION. IF I WERE TO WIPE OUT MY RIGHT VENTRICULAR DEPOLARIZATION WHAT I WOULD SEE IS THE ORDER OF MAGNITUDE WOULD INCREASE, BUT THE RIGHT VENTRICLE IN THERE IS TAKING AWAY FROM THAT SO I GETS A LITTLE BIT SMALLER. |
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Term
| WHAT IS THE DIFFERENCE BETWEEN qR AND QR? |
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Definition
| THE SIZE OF THE DEFLECTION. <3MM = LITTLE DEFLECTION. |
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Term
| WHAT DOES T WAVE REPRESENT? |
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Definition
| VENTRICULAR REPOLARIZATION |
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Term
| REPOLARIZATION OCCURS FROM THE ___ TO THE ___. |
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Definition
| EPICARDIUM TO THE ENDOCARDIUM. FROM OUTSIDE TO THE INSIDE. |
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Term
| WHAT IS THERE AN UPWARD REFLECTION OF THE T WAVE? |
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Definition
| REPOLARIZATION IS MOVING TOWARD THE NEGATIVE ELECTRODE. |
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Term
| WHY IS THE T WAVE MUCH MORE BROAD THAN THE QRS COMPLEX? |
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Definition
| IT TAKES MORE TIME TO REPOLARIZE. |
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Term
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Definition
| WHEN THE HEART IS FULLY DEPOLARIZEZ, THERE IS NO ELECTRICAL ACTIVITY FOR BRIEF PERIOD (ST SEGMENT). THIS HAS TO DO WITH THE VENTRICULAR MYOCYTE ACTION POTENTIAL. PHASES: IN PHASE 2 CALCIUM IS COMING INTO THE CELL. THE AMOUNT OF CALCIUM THAT IS COMING IN EQUALS THE AMOUNT OF POTASSIUM THAT IS GOING OUT. IF I HAVE A CATIONIC EFFLUX AND AN ANIONIC INFLUX THAT ARE BALANCES WITH EACH OTHER MY MEMBRANE POTENTIAL WILL STAY THE SAME. THERE IS NO WAVE FRONT. |
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Term
| VENTRICULAR REPOLARIZATION HAS A VECTOR DIRECTED WHERE? |
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Definition
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Term
| WITH VENTRICULAR REPOLARIZATION WHAT DOES LEAD I AND AVF DO? |
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Definition
| THEY BOTH HAVE A POSITIVE REFLECTION. |
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Term
| FOR THE MYOCYTES CALCIUM RELEASE FROM THE SR REQUIRES WHAT? |
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Definition
| AN INFLUX OF CALCIUM FROM THE EXTRACELLULAR STORES. IN CARDIAC MUSCLE WHAT HAPPENS IN IS CALCIUM INFLUX FROM THE OUTSIDE THE CELL INDUCES THE SR TO RELEASE CALCIUM. IT IS A CALCIUM INDUCED CALCIUM RELEASE. THE FIRST CALCIUM IS CALCIUM THAT IS COMING FROM THE EXTRACELLULAR FLUID INTO THE CELL AND THAT INDUCED THE SR TO RELEASE THE CALCIUM FOR CONTRACTION. |
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Term
| OF ALL THE CALCIUM THAT BINDS TO TROPONIN C IN CARDIAC MUSCLE __% OF THAT COMES FROM EXTRACELLULAR STORES AND THE OTHER __% OF THAT COMES FROM THE SR. |
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Definition
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