Why the study?
Understanding the characteristics of T-wave variations associated with specific diseases and pathologies is clinically important.
Understanding the specific morphological characteristics of T-wave abnormalities is crucial for the differential diagnosis of various underlying conditions, including myocardial ischemia, electrolyte imbalances, and cardiomyopathies.
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T-wave patterns aid differential diagnosis in ischemia and cardiomyopathies; leaves open prospective validation of diagnostic performance.
心電図でのt波は,心室の興奮消退(再分極)を反映しており,活動電位持続時間に較差が生じる状態や心室興奮伝播の変動の影響を受け,陰性・2相性・平坦化等,様々に変化する.心電図t波の変化は,一次性変化と二次性変化に分類される.一次性変化は,心筋虚血や心筋梗塞,心肥大などの病態に伴って心室の各部で活動電位持続時間に較差が生じる状態で認められるt波変化である.一方,二次性変化は,心室期外収縮や脚ブロック,wpw症候群などでみられる心室興奮伝播の変化に基づくst-T波形変化である.臨床的に重要なのは,高カリウムや心筋梗塞急性期におけるt波増高,肺塞栓における陰性t波,虚血性心疾患における2相性・陰性t波,肥大型心筋症・脳血管障害やたこつぼ型心筋症に伴う巨大陰性t波である.疾患・病態ごとのt波の特徴をおさえておくことが重要である.
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Kenji Yodogawa (2022) conducted a review in T wave abnormalities.
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