Final answer:
Tachycardia usually presents with tachycardia as a result of low extracellular volume; treatment depends on the underlying cause and may include medications, implantable cardioverter defibrillators, ablation, or surgery.
Step-by-step explanation:
Tachycardia usually presents with tachycardia as a result of low extracellular volume; the heart will increase its rate and contractility in an effort to maintain cardiac output.
Tachycardia is defined as a heart rate above 100 bpm and can be triggered by various factors such as extreme stress, stimulation from the limbic system, disorders of the autonomic nervous system, fever, anemia, hypoxia, hyperthyroidism, hypersecretion of catecholamines, cardiomyopathies, disorders of the valves, and acute exposure to radiation.
Treatment depends on the underlying cause and may include medications, implantable cardioverter defibrillators, ablation, or surgery.