Hypertension: a symptomless but dangerous disease.
D004844:Epistaxis / Q000209:etiology; D006261:Headache / Q000209:etiology; D006801:Humans; D006973:Hypertension / Q000150:complications / Q000175:diagnosis*; D013575:Syncope / Q000209:etiology; D014717:Vertigo / Q000209:etiology