急性心筋梗塞の発症時の状況と誘因

Conditions and Triggers of Acute Myocardial Infarction

　急性心筋梗塞患者132名（男性101名，女性31名）を対象として発症前および発症時の状況についてアンケート調査を行った．発症時刻は午前10時から12時までの時間帯が最も多かった．睡眠中の発症は25〜32％，65歳以下の男性では労作中の発症が52％と高率であった．発症した場所は65歳以下の男性では，自宅（52％）と自宅外（48％）がほぼ同率で，66歳以上の男性と女性では自宅で発症する割合が高かった（それぞれ73％と77％）．全く突然に発症した割合は，65歳以下の男性55％，66歳以上の男性68％，女性87％であった．発症の誘因として，65歳以下の男性では仕事上のストレス，酒，喫煙，不規則な生活など複数の要因をあげた患者が多かった．66歳以上の男性では喫煙が多く，女性では過労や配偶者の病気に伴うストレスが目立った．

We examined using a questionare method, the condi-tions and triggers of acute myocardial infarction (AMI) in 132 patients (male/female: 101/31, age: 64.2 ±7.1 years old. The most frequent onset time was between 10AM and 0 PM. In 25% to 32% of patients the onset was during sleep. The incidence of MAI during physical activity was higher in males below 65 years old (52%) than in males over 65 years old (29%). 52% of males below 65 years old had AMI at home. However the incidence of AMI at home was much higher in males over 65 years old (73%) and in females (77%). Among the 132 patients studied, sudden onset, which means the lack of preexisting symptoms, occurred in 55% of males below 65 years old, 68% of males over 65 years old, and 87% of females. The triggers of AMI were not clear. However stress in work, smoking, and heavy drinking were noted in males below 65 years old. Males over 65 yeras old lacked outstanding triggers except smoking. Triggers in females were overwork and stress in family life, especially the illness of a spouse.