CARDIAC- HEALTHSTREAM TELEMETRY TEST EXAM 2023

CARDIAC- HEALTHSTREAM TELEMETRY TEST EXAM 2023 along what axis is time measured in an EKG paper? - CORRECT ANSWER-across a horizontal axis what does each small square on an EKG strip represent? - CORRECT ANSWER-1 mm in length 0.04 seconds what does each large square on an EKG strip represent? - CORRECT ANSWER-5 mm in length 0.2 seconds how can a regular rhythm be calculated on an EKG strip? - CORRECT ANSWER-when the rhythm is regular, the heart rate is 250 divided by the number of large squares between the QRS complexes i.e. 3 large squares between regular QRS complexes, the heart rate is 83 (250/3=83) how can an irregular rhythm be calculated on an EKG strip? - CORRECT ANSWERcount the number of R waves in a 6 second strip and multiply the number by 10 i.e. 7 R waves in a 6 second strip, the heart rate is 70 (7x10=70) true or false: on a typical EKG grid, 5 small squares, or 1 large square, represent 0.2 seconds of time - CORRECT ANSWER-true what does the P wave indicate? - CORRECT ANSWER-atrial depolarization or contraction of the atrium *no notching or peaking should be present* what is the normal duration of the P wave? - CORRECT ANSWER->.20 seconds (less than 5 small squares) what is the normal amplitude of the P wave? - CORRECT ANSWER-aka height >3 mm what does the QRS complex indicate? - CORRECT ANSWER-ventricular depolarization, or contraction of the ventricles what is the normal duration of the QRS complex? - CORRECT ANSWER->.12 seconds should be 3 small boxes or less true or false: R waves are deflected positively - CORRECT ANSWER-true are the Q and S waves deflected negatively or positively? - CORRECT ANSWERnegatively what does the T wave indicate? - CORRECT ANSWER-ventricular repolarization *should be rounded and symmetrical* what are the four basic steps to EKG interpretation? - CORRECT ANSWER-1. are normal P waves present? 2. are the QRS complexes narrow or wide? 3. what is the relationship between P waves and QRS complexes? 4. is the rhythm regular or irregular? what can be indicated if P waves are not present before every QRS complex? - CORRECT ANSWER-PVCs PACs Complete heart block what are the major components of normal sinus rhythm? - CORRECT ANSWER-1. P waves normal 2. QRS complexes normal 3. there is one P wave for every QRS complex 4. the rhythm is regular 5. heart rate is WNL what is the first step in every situation where the nurse notes an irregular telemetry reading? - CORRECT ANSWER-assess the patient! what are the major components of sinus bradycardia? - CORRECT ANSWER-1. HR is 40-59 BPM 2. normal P waves present 3. QRS complex is normal (0.6-.12) 4. PR interval can be normal or slightly prolonged 5. rhythm is regular or slightly irregular how is symptomatic sinus bradycardia treated? - CORRECT ANSWER-treatment of underlying cause atropine as potential medication: dosage is dependent on situation true or false: sinus bradycardia is abnormal and must be treated - CORRECT ANSWER-false what are the major components of sinus tachycardia? - CORRECT ANSWER-1. HR is 101-160 BPM 2. P waves are normal 3. QRS complexes are normal 4. conduction is normal 5. rhythm can be regular or slightly irregular` what are some examples of underlying causes of sinus tachycardia? - CORRECT ANSWER-increased circulating catecholamines CHF hypoxia PE increased temperature stress pain response dehyrdation fluid volume deficit via blood loss, etc what is the treatment of sinus tachycardia? - CORRECT ANSWER-identification of underlying causes and correction of them what should be considered regarding the rhythm present in sinus tachycardia? - CORRECT ANSWER-may be difficult to assess depending on close proximity of complexes true or false: sinus tachycardia is a normal response to pain - CORRECT ANSWER-true where is the heart rate originating from in supraventricular tachycardia? - CORRECT ANSWER-from above the ventricles and is going at a faster rate than them what are the major components of supraventricular tachycardia? - CORRECT ANSWER-1. rhythm is regular 2. HR 150-250 typically 3. PR interval difficult to measure 4. QRS complexes at a normal rhythm and distance apart 5. often paroxysmal what does paroxysmal mean? - CORRECT ANSWER-has a sudden onset and sudden termination