Effect of Colloids Versus Crystalloids on Heart Mechanics: a Double-blind Cross Over Randomized Trial

Volunteers will undergo a comprehensive transthoracic echocardiography to measure left ventricular torsion, global longitudinal strain, left atrial strain and free wall right ventricular strain before any intervention. Initially, 500 ml of the specified but blinded solution will be administered, followed by a repeat of the echocardiographic process. Subsequently, an additional 500 ml will be given, totaling 1000 ml, and strain curves will be reacquired. After a washout period of 7 days, the same procedure will be repeated with the second solution.

Volunteers will undergo a comprehensive transthoracic echocardiography to measure left ventricular torsion, global longitudinal strain, left atrial strain and free wall right ventricular strain before any intervention. Initially, 500 ml of the specified but blinded solution will be administered, followed by a repeat of the echocardiographic process. Subsequently, an additional 500 ml will be given, totaling 1000 ml, and strain curves will be reacquired. After a washout period of 7 days, the same procedure will be repeated with the second solution