Parameter | Correlation | Study design | First author [ref.] |

Pericardial effusion | Mortality | Retrospective, multi- centre; n=276 | Zhang [24] |

Mortality | Registry data; n=2716 | Benza [4] | |

Mortality; combined end-point death/transplantation | Prospective, multi- centre; n=81 | Raymond [25] | |

Right ventricular failure; exercise tolerance; poor prognosis | Single centre; n=79 | Hinderliter [26] | |

Right atrial size | Mortality; transplantation | Prospective, single centre; n=25 | Bustamante-Labarta [27] |

Right atrial indexed area | Mortality | Prospective, multi- centre; n=81 | Raymond [25] |

Right ventricular diameter | Mortality | Prospective, single centre; n=72 | Ghio [28] |

Right ventricular fractional area change | Mortality | Prospective, single centre; n=59 | Ghio [29] |

TAPSE | Survival | Prospective, single centre; n=59 | Ghio [29] |

Right ventricular function; survival | Prospective, single centre; n=47 | Forfia [30] | |

Right ventricular myocardial performance (Tei) index | Cardiac death/transplantation | Retrospective, single centre; n=53 | Yeo [31] |

Degree of pulmonary regurgitation; left ventricular eccentricity index; presence of pericardial effusion | Retrospective, single centre; n=93 | Grapsa [32] | |

Tricuspid valve regurgitation | Survival | Prospective, single centre; n=59 | Ghio [29] |

Mortality; transplantation | Prospective, single centre; n=25 | Bustamante-Labarta [27] | |

Eccentricity | Survival | Prospective, single centre; n=59 | Ghio [29] |

Composite end-point of death/transplantation | Prospective, multi- centre; n=81 | Raymond [25] | |

Right ventricular free wall systolic strain | Disease severity, disease progression and mortality | Prospective, single centre; n=80 | Sachdev [33] |

Right ventricular dyssynchrony | WHO FC; eccentricity index; hospitalisations due to PH/heart failure | Prospective, single centre; n=52 | López-Candales [34] |

Right ventricular systolic to diastolic duration ratio | Clinical outcomes; 6MWD; death or transplantation; right ventricular fractional area of change | Retrospective, single centre; n=47 | Alkon [35] |

TAPSE: tricuspid annular plane systolic excursion; WHO FC: World Health Organization functional class; PH: pulmonary hypertension; 6MWD: 6-min walk distance.