Cardiac- Telemetry questions and answers rated A+

Cardiac- Telemetry 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 answer count 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 answer negatively 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