EKG 60 Questions Questions With Complete Solutions

the heart has 2 components: mechanical and __________ correct answer: electrical to fully evaluate a patient's cardiac function, you must assess _______,_______, and _______ correct answer: Pulse, pressure, ECG (EKG) electrocardiography is the study of _______ correct answer: arrhythmias repolarization represented by the ST segment and T waves occurs ________ QRS depolarization in an individual complex correct answer: after A test that creates high frequency sound vibrations that are sent into the heart through the chest wall is known as correct answer: echocardiogram 3 major areas of the conduction system are the ventricle, SA node, and the ______ correct answer: AV node To obtain the test results on the ECG reading you should ______ correct answer: clean skin area, use contact medium, and abrade skin slightly If electricity flows towards the negative electrode, a _______verdict pattern is produced on the graph correct answer: downward/ inverted Time is measured by measuring the number of square blocks along the _______ lines on the graph paper correct answer: x-axis Voltage is measured by comparing the height of a spike to the _______ lines on the graph paper correct answer: y-axis What is the standard rate at which the ECG machine runs paper past the stylus? correct answer: 25mm/sec How long does it take to get from one bold line to ECG graph paper to the next bold line? correct answer: 0.20 seconds consider the 5 small squares between the bold lines on the ECG graph paper; how much time is needed to cross 1 small square? correct answer: 0.04 seconds How many prominent waves are in one complete cardiac cycle? correct answer: 5 The distance between waves is referred to as _____ correct answer: intervals The line between the P wave and the next wave is called______ correct answer: PR segment the p wave in indicated of ______ correct answer: atrial depolarization a line between waves is called ______ correct answer: a segment the ___________ refractory period occurs when the cells cannot respond to stimuli correct answer: absolute the ______________ refractory period occurs when the cells are able to respond correct answer: relative The major categories of arrhythmias are _______ correct answer: sinus, atrial, junctional, and ventricular In interpreting an arrhythmia, which of the following questions should you ask? correct answer: Are all QRS complex of all equal duration? Do all P waves look alike? Is the rhythm irregular? The quick way to calculate regular rhythm heartbeat is to count the number of small squares between 2 consecutive R waves and divide into _____ correct answer: 1500 When electrical current moves through the heart from the right arm towards the left arm, a positive deflection is registered in lead _____ correct answer: AVR When the ECG selector switch is turned to lead 2, a connection is made between the left leg and the ________ correct answer: right arm The positive pole of lead 3 is at the left leg and the negative pole is at the______ correct answer: left arm Sinus P waves differ from ectopic atrial P waves because they are ______ and _______ correct answer: Upright and uniform Impulses from the AV node go through the bundle of his to the correct answer: right and left bundle branches The QRS measurement for a PAC should be correct answer: bigger than .12 seconds What is the rate range for junctional tachycardia? correct answer: 100-180 Atrial fibrillation is demonstrated with the rate of more than correct answer: 350 bpm what rhythms originate in the AV junction? correct answer: premature junctional contraction, accelerated junctional rhythm, junctional tachycardia and junctional escape rhythm conduction system place in order correct answer: bundle of his, purkinje fibers, AV node, Intra-atrial pathways, SA node, Left and Right bundle branches two or more premature beats that are different in nature are called correct answer: multifocal two or more premature beats that appear identical are called correct answer: unifocal in what order are the waves named? correct answer: p wave, QRS wave, T wave aVR, aVL, aVF are also known as ___ leads. correct answer: augment leads which senses are used for lead II? correct answer: Right arm and Left leg typically, a complete ECG consists of _____ leads correct answer: 12 leads as the ventricles return to their polarized state, the _______ wave is recorded correct answer: T wave when an ECG is recorded at 50 mm per second, what happens to the ECG? correct answer: stretches Each ECG machine must be calibrated so that a ______ MV standardization signal produces a deflection of exactly 10mm correct answer: 1 a small wave sometimes appearing between the T wave and P wave is the _____ wave correct answer: V wave Which wave form would not be seen in a normal EKG? correct answer: V-wave which senses are used for lead 1? correct answer: Left arm and right arm which senses are used for lead 3? correct answer: Left arm and Right leg the precordial leads are the _______ leads correct answer: chest or V leads when placing the electrodes on the patient's chest, where should the V3 should be positioned? correct answer: between V2 and V4 when placing the electrodes on the patient's chest, V2 is measured at the 4th inter coastal space _______ correct answer: left margin or sternum when placing the electrodes on the patient's chest, where is V6 is positioned? correct answer: after V5 when placing the electrodes on the patient's chest, where should V5 be positioned? correct answer: between V4 and V6 when placing the electrodes on the patient's chest, V4 should be placed at the _______ correct answer: 5th intercostal space Wenkebach is a cyclic pattern that results from progressive delays at the ________ correct answer: AV node Wenkebach is characterized by progressive prolongation of the PR interval on consecutive beats followed by a ______ correct answer: blocked P wave junctional tachycardia is indicated at _______ correct answer: 100-180 bpm accelerated junctional rhythm is indicated at _____ correct answer: 60-100 bpm all junctional arrhythmias will have a PRI no greater than ______ correct answer: .12 seconds Which of these are types of heart block? correct answer: 1st degree heart block, Wenckebach(2nd degree), 2nd degree classical, 3rd degree