The normal QRS complex deflection is positive in leads I and aVF. It is abnormal for the QRS to be negative in aVR.
If Lead I's QRS is positive, the heart's current is traveling toward the right arm.
The precordial leads are placed on the arms and legs.
The electrode on the right leg is the ground electrode and plays no part in any lead.
Einthoven's triangle is formed by joining leads I, II, and III at their ends.
The structure formed by joining all the frontal leads at the center is the hexiaxial diagram.
A positive QRS complex is written by an impulse that travels toward the positive electrode.
The normal QRS deflection in Lead III should be negative.
It is normal for the QRS complex to be primarily positive in V1.
In the precordial leads, we look at current flow in the plane.
The cardiac research pioneer whose work resulted in the law stating that Lead I + Lead III = Lead II is .
A lead is an electrocardiographic .
Lead III measures the current traveling between the .
Einthoven's law states that .
V1's lead is located at the .
A is an arrow that depicts the general direction of current flow.
The is the structure obtained from joining leads I, II, and III at the middle.
Based on Einthoven's Law, the shortest QRS complex should NOT be in Lead .
The difference between unipolar and bipolar leads is that involves two limbs.
An impulse traveling at a right angle to the positive electrode writes on the EKG paper.
Lead aVR's positive electrode is located on the .
Lead aVF's positive electrode is located on the .
Normal current of the heart travels top to bottom and .
V5's QRS complex should be primarily _

Congenital diseases are which of the following? genetic fatal disfiguring noninfectous

Harold, a fifty-eight year old grocery store manager, had recently been waking up in the middle of the night with abdominal pain. this was happening several nights a week. he was also experiencing occasional discomfort in the middle of the afternoon. harold decided to schedule an appointment with his physician. the doctor listened as harold described his symptoms and then asked harold some questions. he noted that harold's appetite had suffered as a result of the pain he was experiencing and as a result of the fear that what he was eating may be responsible for the pain. otherwise, harold seemed fine. the doctor referred harold to a physician that specialized in internal medicine and had harold make an appointment for a procedure called an endoscopy. the endoscopy was performed at a hospital later that week. during the procedure, a long, thin tube was inserted into harold's mouth and directed into his digestive tract. the end of the tube was equipped with a light source and a small camera which allowed the doctor to observe the interior of harold's stomach. the endoscope was also equipped with a small claw-like structure that the doctor could use in order to obtain a small tissue sample from the lining of harold's stomach, if required. the endoscopy revealed that harold had a peptic ulcer. analysis of a tissue sample taken from the site showed that harold also had an infection that was caused by helicobacterpylori bacteria. the doctor who performed the endoscopy gave harold prescriptions for two different antibiotics and a medication that would decrease the secretion of stomach acid. the doctor also instructed harold to schedule an appointment for another endoscopy procedure in 6 months. 1. list the subjective findings in this case study. 2. what is an endoscopy? (2 points) what is a biopsy? 3. how was a biopsy performed on harold? 4. differentiate between gastric and duodenal ulcers by location. 5. what role does h. pylori play in the formation of peptic ulcers? 6. define occult and frank blood. (4 points) what is a guaiac test? 7. how can peptic ulcers cause bleeding? 8. why were antibiotics prescribed? 9. why would a medication that would decrease the secretion of stomach acid be beneficial?

Anurse is assessing a client who receives monthly injections of cyanocobalamin. which of the following findings indicates a therapeutic effect of the medication? a. absence of hand tremors b. hematocrit 45% c. potassium 3.8 meq/l d. improved appetite