Dual Doppler echocardiography is the technique of simultaneously recording Doppler signals of two types, used for recording E wave and e’ simultaneously.
Cutting balloon angioplasty for peripheral pulmonary stenosis if low pressure angioplasty fails, was more effective than high pressure balloon angioplasty.
Anterior papillary muscle Tachycardia has RBBB pattern with right inferior QRS axis while posterior papillary muscle tachycardia has RBBB, superior axis.