<p>Bland & Altman plots a) Qlab 7.0 apex peak rotation at the endocardium b) Qlab 7.0 base peak rotation at the endocardium c) Qlab 7.0 apex peak rotation at the epicardium d) Qlab 7.0 base peak rotation at the epicardium. e) Qlab 8.0 apex peak rotation at the endocardium f) Qlab 8.1 base peak rotation at the endocardium g) Qlab 8.1 apex peak rotation at the epicardium h) Qlab 8.1 base peak rotation at the epicardium.</p