CLINICAL MEDICINE

MEDICINE

CARDIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
A positive QRS deflection in lead I means the vector is heading toward the:
A
left leg.
B
left arm.
C
right leg.
D
right arm.
Explanation: 

Detailed explanation-1: -A positive QRS deflection in lead l means the vector is heading toward the: Left arm. Atrial kick is defined as : The volume of blood that the atria contract to the ventricles.

Detailed explanation-2: -If the electrical current is flowing towards the lead then a positive deflection will be seen. If flowing away from lead then a negative deflection will be seen.

Detailed explanation-3: -The mean QRS axis normally points downward and to the patient’s left, between 0 and +90 degrees. An axis between +90 and +180 degrees indicates right axis deviation, and one between 0 and-90 degrees indicates left axis deviation.

Detailed explanation-4: -Left Axis Deviation If the QRS is upright in lead I (positive) and downward in lead aVF (negative), then the axis is between 0 and-90 degrees.

There is 1 question to complete.