eart failure (HF) affects more than 6 million individuals in the United States, 1,2 only a small fraction of whom receive heart transplant (HT) or mechanical circulatory support (MCS) such as left ventricular assist devices (LVADs). [3][4][5][6] Patients with advanced or stage D HF are subject to exceptionally high mortality. In a 2018 contemporary study of 969 patients with advanced HF who had not previously received advanced therapies or inotropes, 3-year mortality rate ranged from 26% to 44% depending on the severity of clinical presentation. 7 However, epidemiologic data about survival in patients with advanced HF are very limited. Importantly, patients with symptomatic HF also have significant morbidity, experiencing a similar burden of physical and depressive symptoms to patients with advanced cancer. 8 For a subset of patients with advanced HF with reduced ejection fraction (HFrEF), ambulatory intravenous inotropic support may be considered as a palliative therapy.Concerns about harm have generally kept continuous ambulatory inotrope use low in the last 2 decades. 9 However, presumably owing to ongoing unmet palliative needs and some recent publications about the potential benefit of targeted use for palliation, between 2010 and 2014, there was a 63% (from approximately 1200 to 2000 beneficiaries) and 44% (from approximately 400 to 575 beneficiaries) increase in the number of Medicare beneficiaries re-ceiving home milrinone and home dobutamine, respectively. 10 Still, health care professionals face uncertainty when considering initiation of ambulatory inotropes for palliation, given the paucity of robust data and guideline support as well as logistical issues, particularly if hospice is also desired. [11][12][13][14] The purpose of this review is to provide guidance to clinicians on initiation, selection, maintenance, and weaning or withdrawal of chronic inotropes and the management of concurrent therapies in the modern HF landscape.
Historical PerspectiveIn the 1970s and 1980s, several studies demonstrated positive effects of intravenous inotropes on hemodynamics and symptoms. [15][16][17] Subsequent trials in the 1990s and early 2000s, including PROMISE, 18 FIRST, 19 VEST, 20 OPTIME, 21 and REVIVE II, 22 showed that the use of intravenous or oral inotrope therapy in acute or chronic HF was consistently associated with decreased survival and/or an increased risk of adverse cardiovascular events. In some of these studies, 6-month mortality was in excess of 50%.However, those studies were not designed to address use of inotropes as palliation. They also preceded the current era of modern HF therapies including implantable cardioverter defibrillators (ICDs), IMPORTANCE The number of patients living with end-stage heart failure is steadily growing, and ambulatory intravenous inotropic support is increasingly offered as a palliative therapy. However, the optimal ways to initiate, manage, and discuss the risks and benefits of palliative inotropes in the current era of heart failure care are unclear.OBSERVATION...