The nurse suspects stable angina rather than myocardial infarction pain in the patient who reports chest pain that

A. A 45-year-old with constrictive cardiomyopathy who developed acute dyspnea and agitation about 1 hour before shift change: Acute dyspnea and agitation in a patient with constrictive cardiomyopathy suggest potential cardiogenic pulmonary edema, hypoxia, or acute decompensation. These symptoms indicate immediate hemodynamic instability, making this patient the highest priority for rapid assessment, oxygenation, and intervention.

B. A 26-year-old with heart failure caused by congenital mitral stenosis who is scheduled for balloon valvuloplasty later today: While this patient has a significant cardiac history, the patient is currently stable and preparing for a scheduled procedure. Immediate assessment is not urgent compared with acute respiratory distress in another patient.

C. A 77-year-old who transferred from intensive care 2 days ago after coronary artery bypass grafting and has a temperature of 100.6 degrees F: Mild postoperative fever is common and may indicate an early inflammatory response. While it requires monitoring and potentially intervention if trends increase, it is less urgent than acute dyspnea with agitation.

D. A 56-year-old who had a coronary angioplasty and stent placement yesterday and has complained of occasional chest pain since the procedure: Occasional mild chest pain is important to monitor for post-procedural complications, but unless the pain is severe, persistent, or associated with other alarming signs, it is not as immediately life-threatening as acute respiratory distress in a patient with cardiomyopathy.

A. Initiate CPR: Pulseless ventricular tachycardia is a life-threatening cardiac arrest rhythm. Immediate initiation of high-quality cardiopulmonary resuscitation (CPR) is the highest priority to maintain circulation and perfusion to vital organs. Early CPR improves the likelihood of return of spontaneous circulation and survival until defibrillation and advanced interventions can be performed.

B. Administer oxygen: While oxygen is important, providing supplemental oxygen does not replace the need for immediate CPR in a pulseless patient. Oxygen delivery becomes effective only if circulation is maintained, which is why CPR takes precedence.

C. Administer an antidysrhythmic agent: Antidysrhythmic drugs such as amiodarone may be used during pulseless V-Tach according to ACLS protocols, but administration is secondary to initiating CPR and defibrillation. Delaying CPR to give medication would reduce chances of survival.

D. Instruct the client to inhale deeply and cough: Cough CPR or the Valsalva maneuver is ineffective in true cardiac arrest. A pulseless, unconscious patient cannot follow commands, and these interventions do not provide circulation or address the life-threatening arrhythmia.