Which class of drugs should be administered to a patient with elevated heart rate resulting in increased blood pressure?

B-blockers are the appropriate class of drugs to administer when dealing with a patient who has an elevated heart rate and increased blood pressure. These medications work by blocking the effects of adrenaline on the beta receptors of the heart, which leads to a reduction in heart rate and myocardial contractility. This can be particularly beneficial in scenarios where the patient presents with tachycardia and hypertension, as it helps to lower blood pressure through decreased cardiac output.

Moreover, B-blockers are effective in reducing the workload on the heart, which can help prevent complications such as heart failure or arrhythmias that may arise from sustained high heart rates and blood pressure. They also possess antiarrhythmic properties, making them suitable for managing elevated heart rates associated with various cardiovascular conditions.

In contrast, other classes mentioned, such as A-blockers, calcium channel blockers, and negative inotropes, may not specifically or effectively target the dual issues of elevated heart rate and blood pressure in the same manner that B-blockers do.