Analisis Praktik Residensi Keperawatan Medikal Bedah pada Pasien Gangguan Sistem Kardiovaskular dengan Pendekatan Teori Model Adaptasi Roy di Rumah Sakit Jantung dan Pembuluh Darah Harapan Kita Jakarta = Analysis of Medical Surgical Nursing Residency Specialist Practice Patients Cardiovascular Disorders with Roy Adaptation Approach at National Cardiovascular Center Harapan Kita Jakarta