Med/Surg Cardiovascular updated 2023 Exam (A+ Graded answers offered)

Which of the EKG findings is most likely indicative of Acute Myocardial Infarction (AMI) in a patient presenting with acute chest pain? A. Wide and bizarre QRS complexes in the EKG B. ST segment changes (STEMI or NSTEMI) in the EKG C. A saw-toothed pattern in the EKG saw-toothed pattern in the EKG D. Flat line in the EKG correct answers B. ST segment changes (STEMI or NSTEMI) in the EKG To determine whether there is a delay in impulse conduction through the atria, the nurse will measure the length of the patient's: A. P wave B. PR interval C. QT interval D. QRS complex correct answers A. P wave The P wave represents the depolarization of the atria. The P-R interval represents depolarization of the atria, atrioventricular (AV) node, bundle of His, bundle branches, and the Purkinje fibers. The QRS represents ventricular depolarization. The Q-T interval represents depolarization and repolarization of the entire conduction system. The nurse needs to estimate quickly the heart rate for a patient with a regular heart rhythm. Which method will be best to use? A. Print a 1-minute electrocardiogram (ECG) strip and count the number of QRS complexes. B. Count the number of large squares in the R-R interval and divide by 300. C. Use the 3-second markers to count the number of QRS complexes in 6seconds and multiply by 10. D. Calculate the number of small squares between one QRS complex and the next and divide into 1500. correct answers C. Use the 3-second markers to count the number of QRS complexes in 6seconds and multiply by 10. This is the quickest way to determine the ventricular rate for a patient with a regular rhythm. All the other methods are accurate, but take longer. The nurse obtains a monitor strip on a patient who has had a myocardial infarction and makes the following analysis: P wave not apparent, ventricular rate 162, R-R interval regular, P-R interval not measurable, and QRS complex wide and distorted, QRS duration 0.18 second. The nurse interprets the patient's cardiac rhythm as: A. Atrial fibrillation B. Sinus tachycardia C. Ventricular fibrillation D. Ventricular tachycardia correct answers D. Ventricular tachycardia