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EKG-
ekg rythms and cardiac diseases
| Question | Answer |
|---|---|
| The normal PRI length | 0.12-0.20 |
| The p-wave looks like this | upright and smooth |
| the rate of sinus tachycardia | greater than 100 |
| the rate of sinus bradycardia | less than 60 |
| when everything is the same as normal sinus rhythm exept that the rythm is irregular | sinus arrythmia |
| the normal QRS should be this measurement | less than .12 |
| reasons for a patient to have Atrial fibrilation | underlying heart disease,CHF, rheumatic fever |
| the rate of atrial fibrillation | 350-400bpm |
| the rate of atrial flutter | 250-300bpm |
| checking the heart rate on a six second strip and multiplying it by ten gives you this | ventricular heart rate |
| the segment between the QRS complex and onset of the t wave is this | ST segment |
| when the PR interval is greater than 0.20 seconds | first degree block |
| the lower chambers of the heart | ventricles |
| the upper chambers of the heart | atria |
| two-layered sac surrounding the heart | pericardium |
| inflammation of the serous pericardium | pericarditis |
| the smooth outer surface of the heart | epicardium |
| the thick middle layer of the heart | myocardium |
| the innermost layer of the heart | endocardium |
| the valve located between the right atrium and right ventricle | tricuspid valve |
| the valve located between the left atrium and left ventricle | bicuspid |
| thick walled and muscular blood vesselsthat function under high pressure to convey blood from the heart out to the rest of the body. | arteries |
| drains blood from the head and neck | superior vena cava |
| drains blood from the rest of the body except the head and neck. | inferior vena cava |
| blood vessels that carry blood back to the heart | veins |
| tiny blood vessels that allow for the exchange of oxygen, nutrients,nutrients, and wastes products between the blood and the body | capillaries |
| the heart is located here | mediastinum |
| the lowest chamber of the heart with the thickest myocardium | left ventricle |
| the amount of the blood pumped by the heart in one minute | cardiac output |
| ventricular relaxation | diastole |
| the volume of blood pumped out of the heart of one ventricle of the heart in a single beat or contraction | stroke volume |
| the heart has this many chambers | four |
| the ability of cardiac pacemaker cells to generate their own electricle impulses spontaneously without external stimulation | automaticity |
| the ability of cardiac cells to respond to an electrical stimulus | excitability |
| the ability of cardiac cells to receive an electrical stimulus and then transmit it to other cardiac cells | conductivity |
| ability of cardiac cells to shorten and cause cardiac muscles contraction in response to an electrical stimulus | contractility |
| pacemaker of the heart | SA node |
| the region where the AV nosde joins the bundle of his | AV junction |
| a network of fibers that carries electrical impulses directly to ventricular muscle cells | purkinje's network |
| an adhesive pad that contains conductive gel and is designed to be attatched to the patient's skin | electrode |
| the printed record of the electrical activity of the heart | EKG strip |
| abnormal heart rhythms | dysrhythmias |
| represents depolarization of the left and right atria | p wave |
| represents the time interval necessary for the impulse to travel from the SA node through the internodal pathways in the atria and downward to the ventricles | PR interval |
| the time interval during which the ventricles and depolarized and ventricular repolarization begins | ST segment |
| represents ventricular repolarizationa nd follows the ST segment | T wave |