Physiology 1: Lecture Quiz 6
What would it suggest if lead I became negative and lead III became more positive than lead II? Left axis deviation (LAD) Right axis deviation (RAD)
Right axis deviation (RAD)
What is a common cause of right axis deviation? Atrial septal defect Ventricular septal defect Right ventricular hypertrophy Left ventricular hypertrophy
Right ventricular hypertrophy
Which of the following is never found on physical examination in a patient with atrial fibrillation? S3 heart sound S4 heart sound Fixed split S2 heart sound Paradoxically split S2 heart sound Early diastolic murmur of mitral stenosis
S4 heart sound
Mr. Wilson's ECG shows a biphasic deflection on Lead I and a positive deflection on aVF. What is his mean electrical axis? 0 degrees 90 degrees - 90 degrees -180 degrees
90 degrees
What would you typically see on EKG if a patient had Bundle Branch Block Wide QRS Narrow QRS long PR interval wide QRS and R, R'
wide QRS and R, R'
What would you most likely see in Left Ventricular Hypertrophy? A wide QRS (increased duration) A taller QRS (more mV) Right axis deviation (RAD) A wide QRS (increased duration), a taller QRS (more mV) and Left axis deviation (LAD) All of the above
A wide QRS (increased duration), a taller QRS (more mV) and Left axis deviation (LAD)
Irregular heartbeat of abnormal heart rhythm refers to? Discardia Arrhythmia Atrial asynchrony Heart burn Myocarditis
Arrhythmia
What is an arrhythmia? Accelerated heart beat. Slow heart beat. Irregular heart beat. A type of heart cancer
Irregular heart beat.
What is the best lead for determining RAD? Lead II Lead III Lead I Lead aVF None of the above
Lead I
Which disorder is associated with an ECG with some P waves not being followed by a QRS complex? atrial fibrillation atrial flutter first degree heart block second degree heart block third degree heart block bundle branch block
WRONG atrial fibrillation first degree heart block
Which disorder is associated with an ECG with a prolonged P-R interval? atrial fibrillation atrial flutter first degree heart block second degree heart block third degree heart block bundle branch block
WRONG atrial flutter Hypertrophy
A patient is noted to have an abnormally shortened PR-interval on their ECG. Which of the following is the most likely cause? Wolf Parkinson White Syndrome Right bundle branch block Left bundle branch block AV nodal fibrosis
Wolf Parkinson White Syndrome
What would the mean cardiac axis be if a person has a big positive deflection on Lead I and a small positive deflection on Lead II? between 0 and 30 degrees 0 degress between 30 and 60 degrees 30 degrees
between 0 and 30 degrees
The positive electrode of Lead III is placed on the _____ and is at the _____ angle. left wrist, 120 left wrist, --60 right wrist, -120 left foot, 120
left foot, 120
What view of the heart do leads V5 & V6 represent? left ventricle septum Anterior wall of the right ventricle apex
left ventricle
