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E K G TECHNICIAN X
E K G TECHNICIAN THE HEART AND WHAT IT DOES
| Term | Definition |
|---|---|
| MYOCARDIUM | THE MIDDLE & CONTRACTILE LAYER OF THE HEART |
| ENDOCARDIUM | THE INNER LAYER OF THE HEART |
| EPICARDIUM | THE OUTERMOST LAYER OF THE HEART |
| PERICARDIUM | THIN LAYER OF FLUID THAT PREVENTS FRICTION |
| S1 | FIRST HEART SOUND (LUBB) |
| S2 | SECOND HEART SOUND (DUBB) |
| SYSTOLE | PERIOD OF CONTRACTION OF BOTH ATRIAL AND VENTRICLE BLOOD IS BEING PUMPED TO THE PULMONARY AND SYSTEMIC SYSTEM |
| DIASTOLE | THE PERIOD OF CONTRACTIONOF ALL CARDIAC CHAMBERS RELAXATION WHEN FILLING THE ATRIA AND VENTRICLE OCCURS. |
| MURMURS | ARE CAUSED BY DISEASES OF THE VALVES OR STRUCTURAL ABNORMALITIES |
| STROKE VOLUME | (PRE-LOAD) BLOOD VOLUME EJECTED OUTSIDE THE VENTRICLE AFTER EACH CONTRACTION |
| CIRCULATION | VASCULAR RESISTAANCE AND CARDIAC OUTPUT |
| VASCULAR RESISTANCE | (AFTER-LOAD) |
| CARDIAC OUTPUT | AMOUNT OF BLOOD EJECTED OUTSIDE THE HEART PER MINUTE NORMAL OUTPUT IS 60-100ml HEART RATE X STROKE VOLUME X 1 MINUTE =S LITERS PER MINUTE |
| BLOOD PRESSURE | AKA BP IS FORCE EXERTED BY THE CIRCULATION OF BLOOD VOLUME ONT HE WALLS OF THE ARTERIES DURING CIRCULATION |
| SEMI LUNAR VALVES | HALF MOON SHAPED (3 LEAFLETS) WITH ACCESSORY ORGANS THAT CLOSE AT THE BASE OF THE PULMONARY AND AORTIC VESSELS |
| A.V. VALVES | ATRIOVENTRICULAR VALVES ARE LOCATED BETWEEN THE ATRIA AND VENTRICLE CHAMBERS, NO ACCESSORY ORGANS |
| BRACHMAN'S BUNDLE | PROVIDES A PATHWAY FOR IMPULSES TO TRAVEL TO THE LEFT ATRIA |
| INTERNODAL PATHWAY | SENDS IMPULSES TOT HE A. V. NODES |
| A.V. JUNCTION | THE A.V. J. PORTION OF THE ELECTRIC CONDUCTION SYSTEM OF THE HEART. LOCATED UPPER INTERVENTRICULAR SEPTUM. CONDUCTS THE EXCITATION IMPULSE FROMT EH ATRIA TO THE BUNDLE OF HIS. |
| PURKINJE FIBERS | 20-40 BPM |
| S.A. NODE | SINOATRIAL NODE IS THE PACEMAKER OF THE HEART REGULATES HEAR RATE TO 60-100BPM |
| BUNDLE OF HIS | 40-60 BPM |
| FOUR CHAMBERS OF THE HEART | RIGHT ATRIUM, RIGHT VENTRICLE, LEFT ATRIUM, LEFT VENTRICLE |
| BLOOD FLOWS | ONE DIRECTION THROUGHT THE 4 HEART VALVES; TRICUSPID, PULMONARY, MITRAL AND AORTIC |
| THE HEART IS LOCATED | IN THE MEDIASTENUM, BEHIND THE STERNUM, IN FRONT OF THE SPINE, BETWEEN THE LUNGS ABOVE THE DIAPHRAGM |
| THE BASE OF THE HEART IS LOCATED | 5TH INTERCOSTAL LEFT SIDE |
| TWO KINDS OF HEART CELLS | CONDUCTION AND CONTRACTION |
| CONDUCTION CELLS | CREATE AND CONDUCT THE ELECTRICAL IMPULSES TO TELL THE HEART WHEN TO BEAT |
| CONTRACTION CELLS | CAUSE THE HEART TO CONTRACT RESULTING IN A HEART BEAT |
| HEART IS INFLUENCED BY | THE AUTONOMIC NERVOUS SYSTEM (ANS) WHICH CONTROLS THE INVOLUNTARY BIOLOGICAL FUNCTIONS |
| CORONARY ARTERIES | LEFT ANTERIOR DESCENDING (LAD) CIRCUMFLEX AND RIGHT CORONARY ARTERY |
| LEFT ANTERIOR DESCENDING (LAD) | BRANCH OFF LEFT MAIN CORONARY ARTERY PROVIDE BLOOD FLOW TO ANTERIOR WALL OF THE LEFT VENTRICLE |
| CIRCUMFLEX | BRANCHES OFF TEH LEFT MAIN CORONARY ARTETY PROVIDES BLOOD FLOW TO THE LATERAL WALL OF THE LEFT VENTRICLE |
| RIGHT CORONARY ARTERY | PROVIDES BLOOD FLOW TO THE RIGHT VENTRICLE AND INFERIOR WALL OF THE LEFT VENTRICLE |
| A.N.S. AUTONOMIC NERVOUS SYSTEM | HAS TO PARTS SYMPATHETIC AND PARASYMPATHETIC CAN INFLUENCED THE RATE AND STRENGTH OF CONTRACTIONS |
| SYMPATHETIC NERVOUS SYSTEM | HITS THE ACCELORATOR, IS FIGHT OR FLIGHT RESPONSE, SPEEDS UP HEART RATE, INCREASES BP, DIALATES PUPILS, SLOWS DIGESTION, MEDIATED BY HORMONE NOREPINEPHRINE |
| PARASYMPATHETIC NERVOUS SYSTEM | PUTS ON THE BRAKES, IS REST AND DIGEST RESPONSE, SLOWS DOWN HEART RATE, LOWERS BP, ENHANCES DIGESTION |
| HEART SOUNDS | ARE CAUSED BY CLOSURE OF THE VALVES |
| ARTERIES | CARRY BLOOD AWAY FROM THE HEART , BLOOD IS OXYGENATED 100% |
| VEINS | CARRY BLOOD TO THE HEART, BLOOD IS DEOXYGENATED, UAUALLY 60-75% |
| CORONARY ARTERIES | ARE LOCATED AT THE BASE OF THE AORTA, SENDS BLOOD TO THE HEART |
| CORONARY VEINS | RETURN BLOOD TO EMPTY BACK IN TO THE RIGHT ATRIUM OF THE HEART |
| SKELETON OF THE HEART | STRONG FIBROUS MUSCLE TISSUES THAT PROTECT THE VALVES FROM OPENING DURING A CONTRACTION, SEPARATES ATRIA FROM TEH VENTRICLE |
| AUTOMATICITY | THE ABILITY TO PRODUCE AN ELECTRICAL IMPULSE ON ITS OWN |
| EXCITABILITY | THE ABILITY TO RESPOND TO AN ELECTRICAL STIMULUS |
| CONDUCTABILITY | THE ABILITY TO TRANSPORT AN ELECTRICAL STIMULUS |
| CONTRACTILITY | THE ABILITY TO CONTRACT WHEN STIMULATED |
| HERAT CELLS HAVE 4 UNIQUE PROPERTIES | CONDUCTABILITY, CONTRACTILITY, AUTOMATICITY, EXCITABILITY |
| DEPOLARIZATION | WHEN + POSITIVE ELECTROLYTES MOVE FROM OUTSIDE TO THE INSIDE OF THE CELL CAUSING IT TO BECOME POSITVELY CHARGED. |
| ELECTROLYTES | PRODUCE POSITIVE AND NEGATIVE CHARGES ARE:SODIUM, CALCIUM AND POTASSIUM |
| FLOW OF AN ELECTRICAL IMPULSE | (SA)NODE INTRINSIC RATE 60-100BPM > ATRIA TO (AV) NODE SLOWS TO INTRINSIC RATE OF 40-60 > PURKINJE FIBERS SLOWS AGAIN TO 20-40 BPM IS DISTRIBUTED THROUGHOUT THE VENTRICLES |
Created by:
vondasutton
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