CCI CRAT Exam with complete solutions

Heart Rate of Normal Sinus Rhythm (NSR) - Answer- 60-100 BPM Heart Rate of Sinus Tachycardia (ST) - Answer- 101+ BPM Heart Rate of Sinus Bradycardia (SB) - Answer- 59 or less BPM The horizontal axis on the grid paper records____________. - Answer- time. How many large grid blocks on the EKG paper mark one second in time? - Answer- Five (5). How long in seconds is one large block on the EKG paper? - Answer- 0.2 seconds (thus, five large blocks marks 1 second in time). The vertical axis on the grid paper records _________________. - Answer- EKG Amplitude (voltage). How many millivolts (mV) is one small block on the EKG paper? - Answer- 0.1 mV How many millivolts (mV) is one large block on the EKG paper? - Answer- 0.5 mV 10 mm equals how many millivolts (mV)? - Answer- 1.0 mV 6 mm equals how many millivolts (mV)? - Answer- 0.6 mV 3 mm equals how many millivolts (mV)? - Answer- 0.3 mV 5 mm equals how many millivolts (mV)? - Answer- 0.5 mV What is the amplitude if a complex is 22 small boxes tall, vertically? - Answer- 2.2 mV What is the amplitude if a complex is 14 small boxes tall, vertically? - Answer- 1.4 mV What is the amplitude if a complex is 7 small boxes tall, vertically? - Answer- 0.7 mV How many seconds does one small box horizontally represent? - Answer- 0.04 seconds (thus 5 small boxes horizontally, equals 0.20 seconds (one large box)). What is the normal/typical speed of EKG paper? - Answer- 25 mm/second Name the lettered components of a normal heartbeat found on an EKG? - Answer- P, Q, R, S, T, U What is a P-wave and what does it represent in a heart beat? - Answer- The first deflection. Normally positive (upward) waveform. Indicates atrial depolarization. What follows a p-wave on an EKG tracing? - Answer- A QRS Complex. What does a QRS complex represent? - Answer- Ventricular Depolarization What is a t-wave and what does it represent in a heart beat? - Answer- A "normally" modest positive (upward) waveform. Indicates ventricular repolarization. What is a U-wave? - Answer- Follows the t-wave. Represents recovery of the Purkinje fibers. Important: May not be observable on an EKG tracing. The "Zoll Way" to assist with Rhythm interpretation (REMEMBER TO HELP WITH INTERPRETATION ON THE EXAM): - Answer- Rhythm Rate P Wave PR Interval QRS Interval T Wave How many chambers does the heart have? - Answer- Four (4). The _________________ are the receiving chambers of the heart. - Answer- Atria (Singular: Atrium) The _______________ are the pumping chambers of the heart. - Answer- Ventricles (Singular: Ventricle) What separates the heart into left and right ventricles? - Answer- The Septum