Final answer:
Lead I of the electrocardiograph measures the voltage between the right arm and the left arm. This measurement is part of the electrocardiogram process which records heart activity and helps in diagnosing heart conditions.
Step-by-step explanation:
B) Right arm and left arm Lead I of the electrocardiograph measures the heart's voltage between the right arm and the left arm (B). An electrocardiogram (ECG or EKG) records the voltages created by the wave of depolarization and repolarization of the heart's muscle tissue. Leads form a part of the ECG and are essential in diagnosing various heart conditions.The voltage difference that the Lead I measures is obtained by placing electrodes on the patient's limbs. Among the different types of leads, the Lead II is often discussed, which measures the voltage between the right arm and the left leg; however, this is distinct from Lead I.
Analysis of the voltages recorded across these leads helps in the understanding of heart-muscle function and its correlation with arterial blood pressure.The lead I of the electrocardiograph measures the heart's voltage between the right arm and left arm. The voltage difference between these two limbs can give information about the depolarization and repolarization of the heart muscle. This measurement is an important component of an electrocardiogram (ECG) which is used to assess heart function and diagnose heart conditions.