CCT EXAM PRACTICE (EE) Questions With Complete Solutions

Which of the following leads would help to record the electrical activity in the heart's horizontal plane? -Bipolar lead -12-lead ECG -Precordial leads -Unipolar leads correct answer: Precordial leads This provides a transverse view through the middle of the heart which divides it into upper and lower portions. Of the electrocardiogram waves, which would be considered the first deflection after the diastole that is produced because of the atrial depolarization? -T wave -S wave -Q wave -P wave correct answer: P wave This occurs because of the atrial depolarization of the heart. The Bundle of His has an intrinsic firing rate of which of the following? -40 to 60 beats per minute -30 to 60 beats per minute -60 to 80 beats per minute -80 to 100 beats per minute correct answer: 40-60 beats per minute The Bundle of His is located at the superior portion of the interventricular septum. The Bundle of His is actually the pathway of the electrical impulses that lead out of the SA node. If a patient is experiencing a low blood pressure, which of the following terms would be correct? -Hyper tension -Hypoxemia -Hypotension -Hypoplastic correct answer: Hypotension Hypertension: high blood pressure Hypoxemia: low oxygen concentration in the blood Hypoplastic: when an organ is abnormally small because of a problem with development prior to birth Hypotension: low blood pressure The aVR lead picks up electrical activity from which of the following? -The center of the heart to the right arm -The center of the heart to the left leg -The center of the heart to the left arm -From the left arm to the left leg correct answer: The center of the heart to the right arm The center of the heart to the left leg: aVF The center of the heart to the left arm: aVL The center of the heart to the right arm: aVR From the left arm to the left leg: lead III The Q wave should have a duration of less than how many seconds? -0.30 seconds -0.20 seconds -0.10 seconds