Answer to Question 1
ANS: D
In atrial fibrillation, the symptoms generally depend on the ventricular response rate. The patient may be very symptomatic, with shortness of breath, decreased exercise tolerance, and fatigue, or he or she may be completely asymptomatic. In supraventricular tachycardia, the rate is usually quite high, up to 200 beats per minute, and the patient is aware of palpitations. There may be accompanying complaints of shortness of breath and fatigue, particularly if the arrhythmia persists for any length of time. With bigeminy and trigeminy, patients are usually aware of palpitations or the sensation of missed beats. They may complain of shortness of breath and probably have more of a complaint of weakness or lightheadedness rather than fatigue.
Answer to Question 2
ANS: A
A highly sensitive test for the diagnosis of myasthenia gravis is the measurement of serum levels of circulating acetylcholine receptor antibodies. The Tensilon test is definitive and involves blocking acetylcholine by administering edrophonium chloride. If the patient has myasthenia, the symtpoms will temproarily worsen after the administration of edrophonium chloride. Since thymomas also can be present in these patients, a computed tomography (CT) scan of the chest should be performed.
A medical assistant helps the physician with a patient.
A computerized patient registration form used by offices with electronic health records.
A histologic slide showing the sponge-like architecture of a patient with Creutzfeldt-Jakob Disease.
Oral pseudo membraneous candidiasis in a patient with AIDS.
Severe periodontitis in a patient with uncontrolled diabetes.
An example of a truncated train consist commonly used in rail transportation.