心臟超音波報告：左心房擴大及輕微三尖瓣肺動脈閉鎖不全的可能原因和危險性-心臟血管專科

心臟超音波報告問題？

李醫師您好，今年29歲，因長期胸悶胸痛.容易喘，所以近期有到醫院做超音波檢查，結果顯示左心房擴大45，有輕微三尖瓣肺動脈閉鎖不全。
想問擴大的部分是擴大很多嗎？
是否有危險性？
會是什麼原因造成？
因為心電圖.胸部Ｘ光顯示均無異常，膽固醇血糖血常規肝腎功能也正常本身在家量血壓都正常大部分都是100/70上下，但到醫院量血壓都會上升到140/80以上所以不知道是否為高血壓？
因為沒有這方面知識，還請李醫師抽空幫忙解答，謝謝！報告結果如下：Finding: [Conclusion] 1. Adequate left ventricle systolic function 2. Adequate right ventricle systolic function 3. Dilated left atrium 4. Normal diastolic function with normal left ventricle filling pressure 5. Mild tricuspid, mild pulmonary regurgitation 2-D 心臟超音波檢查報告: Data: (1) Dimensions, thickness and systolic function: Aortic root:27 mm, LA:45 mm, LA vol Index:51 ml/m2 IVS:7 mm, LVpw:6 mm, LV mass Index:52 g/m2, Relative wall thickness:0.23 LVEDD:50 mm, LVESD:31 mm, LVEF(M):68 %, RV TAPSE:28 mm, (2) Wall motion abnormality: nil (3) Diastolic function: Mitral E/A:1.3, DT:151 ms, Pul vein S/D: ＞1, tricuspid E/A: ＞1 Septal E’’:12.6 cm/s, lateral E’’:17.8 cm/s, mean E/E’’:7.1 Normal diastolic function Criteria: (1) Septal E’’ ＜7cm/s or lateral E’’ ＜10cm/s (2) Mean E/E’’ ＞14 (3) TR velocity ＞2.8m/s (4) LA volume index ＞34ml/m2 (4) Valvular heart disease: Anatomy: AV normal, MV normal, TV normal, PV normal AV: AS nil, Jet velocity:1.1m/s, AR nil, MV: MS nil, MR nil, TV: TS nil, TR mild, Peak TR velocity:2.4 m/s, TR Pressure gradient:22.1 mmHg - PV: PS nil, PR mild, PA systolic pressure:25 mmHg (5) Pericardium: Normal, effusion: none (6) Congenital heart: None (7) Others: Mass, thrombus none IVC diameter: ＜2.1cm ＞50% collapse Sinus rhythm