Decalcification of Anterior Mitral Valve Leaflet to Repair Moderate Nonrheumatic Mitral Valve Stenosis with Severe Aortic Valve Stenosis / 日本心臓血管外科学会雑誌

A 78-year-old woman was referred to our hospital because of progressive exertional dyspnea due to nonrheumatic severe aortic valve stenosis and moderate mitral valve stenosis with mitral annular calcification. We subsequently performed aortic valve replacement and mitral anterior leaflet decalcification. During surgery, we found that the cause of mitral valve stenosis was calcification of A2 aortic curtain-medial trigon through aortic valve annulus and resected calcification with SONOPET. The postoperative echocardiography revealed good mitral valve motion with mild mitral valve stenosis.

Cardiac Tamponade due to Detachment of the Aortic Valve Commissure / 日本心臓血管外科学会雑誌

A 68-year-old man was taken to our hospital by ambulance due to syncope. He was in shock with cardiac tamponade. Pericardial drainage was performed. Aortic valve regurgitation gradually increased and surgery was performed at 25 days after onset. Surgical finding showed that there was a detachment of the commissure between the right and non coronary cusps of the aortic valve. An intimal tear was detected in the same place and aortic root replacement was required. The patient had a good recovery and he was discharged 14 days after surgery.

Simultaneous Cardiac Resynchronization Therapy and Mitral Valve Replacement in a Patient with Dilated Cardiomyopathy / 日本心臓血管外科学会雑誌

We performed cardiac resynchronization therapy (CRT) in addition to mitral valve replacement (MVR) in a 66-year-old patient with dilated cardiomyopathy (DCM) associated with complete left bundle branch block (CLBBB) and mitral valve insufficiency. Tissue Doppler echocardiography showed synchronicity of the septum and lateral wall in the left ventricle after CRT. New York Heart Association functional class improved from III to I after CRT and MVR. CRT of the dyssynchronic myocardium in a patient with DCM associated with CLBBB improves regional cardiac function and synchronicity.

Simultaneous Cardiac Resynchronization Therapy and Cardiac Surgery in a Patient with Complete Right Bundle Branch Block (CRBBB), Left Posterior Hemiblock (LPH), and Aortic Valve Insufficiency / 日本心臓血管外科学会雑誌

We performed cardiac resynchronization therapy (CRT) in addition to aortic valve replacement (AVR) in a 74-year-old patient with poor cardiac function (New York Heart Association functional class III, ejection fraction 15%), complete right bundle branch block (CRBBB), left posterior hemiblock (LPH), and aortic valve insufficiency. Tissue Doppler echocardiography showed synchronicity of the septum and posterior segments in the left ventricle, and that contraction of the septum was in the systolic phase of the cardiac cycle after CRT. The New York Heart Association functional class improved from III to I after the operation. CRT of the dyssynchronized myocardium in a patient with CRBBB and LPH can improve regional cardiac function and synchronicity.

Simultaneous Cardiac Resynchronization Therapy and Cardiac Surgery in a Patient with Triple Coronary Vessel Disease, Mitral and Tricuspid Valve Insufficiency after Three-Area Old Myocardial Infarction / 日本心臓血管外科学会雑誌

We performed cardiac resynchronization therapy (CRT) in addition to coronary artery bypass grafting (CABG), mitral valve replacement (MVR) and tricuspid valve annuloplasty (TAP) in a 72-year-old patient with poor cardiac function (New York Heart Association functional class III, ejection fraction 38%), triple coronary vessel disease, and mitral and tricuspid valve insufficiency after three-area old myocardial infarction. Electrocardiography showed no change in the QRS interval after CRT. However, tissue Doppler echocardiography showed synchronicity of the septum and posterior segments in the left ventricle, and that contraction of the septum was in the systolic phase of the cardiac cycle after CRT. New York Heart Association functional class improved from III to I after the operation. CRT of the dyssynchronized myocardium in which ischemia and volume overload were improved by CABG, MVR and TAP may improve regional cardiac function and synchronicity.

Indications and Evaluation of Coronary Artery Bypass Grafting with Myocardial Single Photon Emission Tomography Using 123I-BMIPP, a New Tracer of Myocardial Metabolism of Fatty Acid / 日本心臓血管外科学会雑誌

To evaluate viability and severity of ischemically damaged myocardium, myocardial single emission tomography (SPECT) using 123I-BMIPP (BMIPP), a new tracer of myocardial metabolism of fatty acid, was performed before and after coronary artery bypass grafting (CABG). 201Tl myocardial SPECT (Tl) and left ventriculography (LVG) were also used. Thirty-three revascularized areas in eight patients were investigated. (1) Areas showing good redistribution on Tl and normal uptake on BMIPP indicated good viability and simple ischemic myocardium. Postoperative uptake of both tracers returned to normal levels. (2) Areas showing good redistribution on Tl and severely decreased uptake on BMIPP indicated jeopardized myocardium with severe ischemia. All such areas were seen in patients with unstable angina. Postoperative uptake of both tracers returned to normal levels. (3) Areas showing poor redistributionor severely decreased uptake on Tl and slight uptake on BMIPP indicating hibernating areas. Postoperative uptake became normal or better than preoperative uptake on Tl necrosis. However on BMIPP, the uptake was unchanged or recovered slightly. (4) Areas showing complete defect in Tl and BMIPP indicated necrosis and had no viability. Postoperatively the defect in both tracers were unchanged. Therefore, these areas required no revascularization. The ischemic state of myocardium could be assessed by evaluation of uptake patterns of BMIPP and Tl using myocardial SPECT. Therefore, using this new tracer of myocardial fatty acid metabolism “BMIPP”is useful for deciding culprit and viable lesions requiring coronary revascularization and evaluating therapeutical effects.