619 Prospective Evaluation of anti-SSA/Ro Positive Pregnancies to Address Risk Factors for Fetal Cardiac Disease/Adverse Pregnancy Outcomes and Efficacy of Ambulatory Fetal Heart Rate Monitoring (FHRM) and Rapid Treatment of Emergent Block - Amit Saxena; Jill Buyon; Peter Izmirly; Robert Clancy; Philip Carlucci; Paula Rackoff; Michael Belmont; Anita Moon-Grady; Mala Masson; Kristina Deonaraine; Nicola Fraser; Colin Phoon; et al. (Lupus Science and Medicine, 2022)