NCLEX RN Practice Question # 888. Basics of Electrocardiography ▪ An electrocardiogram (ECG) reflects the electrical activity of cardiac cells and records electrical activity at a speed of 25 mm/second. ▪ An electrocardiographic strip consists of horizontal lines representing seconds and vertical lines representing voltage. ▪ Each small square represents 0.04 second. ▪ Each large…
NCLEX Practice Question # 887. 123 Myocardial Infarction Description MI occurs when myocardial tissue is abruptly and severely deprived of oxygen. Ischemia can lead to necrosis of myocardial tissue if blood flow is not restored. Infarction does not occur instantly but evolves over several hours. Obvious physical changes do not occur in the heart until…
NCLEX Examination. Practice Question # 886. Sinus bradycardia Description Atrial and ventricular rhythms are regular. Atrial and ventricular rates are less than 60 beats per minute. PR interval and QRS width are within normal limits. Treatment may be necessary if the client is symptomatic (signs of decreased cardiac output). A low heart rate…
NCLEX EXamination. Practice Question # 885. Isoniazid Introduction: Indications: Treatment of tuberculosis as part of combination therapy; prophylactic treatment of household members of recently diagnosed tuberculars. Actions: Interferes with lipid and nucleic acid synthesis in actively growing tubercle bacilli. Adverse effects: Peripheral neuropathies, nausea, vomiting, hepatitis, bone marrow suppression, fever, local irritation…
NCLEX Examination. Practice Question # 883. Tuberculosis Description Tuberculosis is highly communicable disease caused by Mycobacterium tuberculosis and Transmitted by the airborne route. Multidrug-resistant strains of tuberculosis can result from improper compliance, noncompliance with treatment programs, or development of mutations in tubercle bacillus. Transmission of Tuberculosis: Transplacental transmission is rare. Transmission can occur…
