A Comparative Study of Left Ventricular Torsion in Normal and Patients with Chronic Stable Angina

INTRODUCTION:

Angina pectoris  refers to the chest pain or discomfort due to coronary heart disease. This often occurs when the heart muscle needs more blood than it is getting

Torsion: During left ventricular (LV) torsion, the base rotates in an overall clockwise direction and the apex rotates in counter clockwise directions when viewed from apex to base. Aim : To assess left ventricular deformation by using torsion among subjects with TMT+ve and compared with normal

OBJECTIVE:

• To compare left ventricular torsion in patients with chronic stable angina and individuals with normal coronary arteries.
• To find the correlation between deformation parameters and coronary artery disease severity by syntax score.

METHOD:

Prospective, case-control study performed on 29 cases and 29 controls . Patients with chronic stable angina whose TMT result was +ve and had undergone echocardiography and angiography were taken as cases. Age and  gender matched healthy subjects were enrolled as controls

RESULT:

• LV IVS and posterior wall thickness, Doppler parameters IVRT and Tie index showed significant difference between chronic stable angina patients and controls.
• Left ventricular deformation imaging had showed slight difference but not significant in peak systolic strain in patients with chronic stable angina when compared with controls.
• Early diastolic strain rate study had showed statistically significant difference in myocardial diastolic deformation rate in chronic stable angina patients when compared with the controls.

CONCLUSION:

• Tie index was significantly altered among TMT+ve subjects when compared with controls.
• Tissue deformation imaging showed significant difference in early diastolic strain rate among two groups whereas global strain was not altered .

1.      Sridevi – Assistant Professor, Dept. of  CVT , SOAHS,MAHE, Manipal 

2.      Ranjini N V, Nishal - Interns, Dept. of  CVT , SOAHS,MAHE, Manipal

3.      Dr. Ranjan Shetty, - Prof. and Head, Department of Cardiology , Manipal Hospital, MAHE,  Manipal

4.      Dr. Krishnananda Nayak, Associate Professor and Head, Department of CVT, SOAHS, MAHE, Manipal