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Tachycardia - Symptoms and causes - Mayo Clinic
Tachycardia: Symptoms, Causes & Treatment - Cleveland Clinic
Tachycardia - Diagnosis and treatment - Mayo Clinic
Tachycardia: Causes, Symptoms, and Treatment - WebMD
Tachycardia: Fast Heart Rate - American Heart Association
Tachycardia - Wikipedia
Tachycardia > Fact Sheets - Yale Medicine