electrocardiography
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| show | electrocardiograhm measures the amount of the electrical activity produced by the heart and the time necessary for impulses to travel through the heart during each heartbeat.
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| show | 1. damage to the mycardium caused by MI 2. detect and evalualate cardio arrythythemia 3. detect mycardio ischemia 4. asses effects of cardiac meds on the heart. 5. determine if electrolyte imbalance is present.
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| show | 2 upper chambers: the atria 2 lower chambers: ventricles
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| right atrium | show 🗑
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| show | oxygenated blod leaves the heart here and is delivered cells, tissues and organs of the body
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| Sinoatrial node | show 🗑
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| depolarazation | show 🗑
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| repolarazation | show 🗑
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| show | heart relaxes breifly
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| baseline | show 🗑
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| show | deflection upward-postive deflection, delection downward negative deflection
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| show | waves represent depolarization (contraction) and repolarazation (recovry) of the myocardial cells.
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| show | represents atrial depolarazation and is recorded as a positive deflection
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| show | represents ventricular depolarazation
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| show | respresents ventricular repolarization and is a positive deflection
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| show | 0.8 seconds
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| single channel electrocardiograph | show 🗑
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| show | an electrocardiograph that can simultaneously record several different leads advantage is speed requires paper that is 8 1/2 inches and it fits into the patient record with no cutting or mounting
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| show | records three channels at one time. it records 1, 2, 3, aVR, aVL, and aVF and V1, V2, V3, V4, V5 and V6
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| ECG paper | show 🗑
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| Electrolyte | show 🗑
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| show | detect electrical impulses on the body surface and relay them through cables or lead wires to the ECG machine, disposable electrodes should be kept in an airtight bag because they dry out and will not stick well
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| show | consists of 10 sensors that record 12 leads of the hearts electrical activity from different angles allowing for a through three dimensional interpretation of its activity
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| Electrical Impulse | show 🗑
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| show | 4 limbs and chest
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| show | first three leads that are recorded on standard ecg are called leads 1, 2, 3
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| Bipolar leads | show 🗑
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| show | records the electrical activity between the RA and LA
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| LEAD 2 | show 🗑
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| LEAD 3 | show 🗑
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| show | is on lead 2 because it protrays the hearts rhythm better than other leads the rhythm strip is usally a seperate, longer recording approximately 6-12 inches long
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| show | the next 3 leads are augmented (added to) or combined leads and are designated aVR, aVL and aVF these are Unipolar leads
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| show | records the electrical activity from the midpoint between the LA added to the LL directed to the RA
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| aVL | show 🗑
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| show | records the electrical activity from the midpoint between the ra addded to the la directed to the ll
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| Chest Leads or precoridal leads | show 🗑
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| show | 4th intercostals space to the right of the sternum
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| v2 | show 🗑
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| show | 5th intercostals space at the left midclavicular line
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| show | midway between v2 and v4
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| v6 | show 🗑
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| show | horizontal to v4 at the left anterior axillary line between v4 and v6
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| Standaraztion of the machine | show 🗑
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| show | aka muscle tremor, characterized by jagges peaks or irregularity of spacing and height occurs when a paitent is apprenhesive or uncomfortable
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| show | caused by electrical interference appears as a serier of small regular peaks electricity present in medical wquipment or wires in the area can leak a small amt of energy into the room in which the ecg is being recorded, causes, improper grounding.
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| show | occurs when the stylus moves from the center of the ecg paper resulting in the complexes wandering across the paper, electrodes too loose or too tight
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| interrupeted baseline | show 🗑
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| show | refers to an ecg that is within normal limits
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| show | normal limits for adult
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| bradycardia | show 🗑
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| tacycardia | show 🗑
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| show | cardiac cycle that occurs before the next cycle is due pwave is shaped differently than a p wave of normal cycle
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| show | seen in healthy and cardiac patients characterized by its unprovoked sudden onset and abrupt termination heart rate is regular and ranges between 160-250 beats per min
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| show | seen in healthy or cardiac patiens
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| show | characterized by extremely rapid incomplete contractions 400-500 beats per minute resulting in small irregular and uncoordinated complexes that are difficult to measure because P wave cannot be distinguished
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| Premature ventricular contractions | show 🗑
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| Ventricuar tachycardia | show 🗑
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| v tach | show 🗑
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| show | an electrical device that applies counter shocks to heart through electrodes or pads placed on the chest wall, purpose is to convert cardiac arrhythmia into normal sinus rhythm used in emergency situation
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| Holter Monitor | show 🗑
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| mV1(holter monitor) | show 🗑
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| show | right clavicle, lateral to sternum b (white)
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| show | left clavicle, lateral to sternum c (brown)
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| mV5 (holter monitor) | show 🗑
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| ground (holter monitor) | show 🗑
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| diary of holter monitor | show 🗑
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| show | aids in the determination of the patients diagnosis and prognosis it's taken under controlled conditions while the patient is closely monitored by the ma and provider
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| show | simlilar to the treamill stress test in that the patient has an ecg tracing while exercising on the treadmill after having an injection of a radioactive substance such as thallium
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| PTCA | show 🗑
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| CAB | show 🗑
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