Cardiovascular guidewires; medical guidewires; apparatus for non-invasive surgery; medical devices for micro-surgery; cardiac catheters; medical apparatus for use in cardiac surgery; angioplasty balloon catheters; angioplasty catheters; cardiac catheters; cardiovascular catheters; catheter apparatus; catheters; catheters for medical use; catheters for surgical use; coronary balloon dilatation catheters for angioplasty; guide wires for use with balloon dilatation catheters; guide wires for use with balloon dilation catheters; medical catheter placement devices; medical catheters; cardiovascular guidewires; guide wires for percutaneous transluminal coronary angioplasty; guide wires for use with balloon dilatation catheters; guide wires for use with balloon dilation catheters; medical guide wire; medical guidewires