Final answer:
To manage sinus tachycardia in a patient with CAD, CHF, and on Adderall, it's vital to check their temperature and fluid volume status, as fever and dehydration can exacerbate the condition. Caffeine reduction may also help, as it's a stimulant that could increase heart rate. Treatment centers on addressing the underlying cause, potentially involving medications or cardiac procedures.
Step-by-step explanation:
When considering a case of sinus tachycardia (ST) as a complication in a patient with longstanding coronary artery disease (CAD), angina, and congestive heart failure (CHF), and who has recently started on Adderall and is experiencing anxiety, dehydration, and fever, the priority intervention would be to check the patient's temperature and fluid volume status. This is due to the fact that tachycardia can be exacerbated or caused by fever and dehydration. Sinus tachycardia is defined as a heart rate (HR) above 100 beats per minute (bpm) and can have various underlying causes, some benign and some more severe. Factors such as electrolyte imbalances, hyperthyroidism, autonomic nervous system disorders, and others can influence heart rate. If sinus tachycardia is present, reducing caffeine intake may also be beneficial, as caffeine is a stimulant that can increase HR. In treating tachycardia, identifying and managing the underlying cause is crucial, and this may involve medications, procedures such as ablation, or devices like implantable cardioverter defibrillators.