Arrhythmia
Arrhythmia is a condition of the heart, in which the protagonist, Hisao has been diagnosed with. Arrhthmia is essentially, a disturbed heart rythmn.
History
Hisao's condition became evident when he suffers a heart attack at the begging of the story. The doctors expressed their amazement that it didn't show it's self until he was a teenager. He was diagnosed with it shortly there after. He struggled to live with the symptoms for a while after before eventually overcoming and learning to live with them.
Symptoms
Arrhythmia is often detected at an early age, but in Hisao's case, it dis not become evident until he suffered a heart attack in his teen years. during moments in the story he would often have heart palpitations, a common symptom that can be dangerous. The heart may beat to quickly, to slowly or erratically.
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