Immunotherapy has become a cornerstone in oncology; however, managing its associated adverse events poses a significant clinical challenge. Cardiotoxicity represents a major concern, among which myocarditis accounts for a considerable proportion. This condition is characterized by poor prognosis, highly heterogeneous outcomes, and a high prevalence of persistent cardiac dysfunction after the acute phase. The dual impact of myocardial injury and underlying malignancy severely compromises patients' quality of life. Currently, it remains unclear whether implementing rehabilitation strategies for this patient population can mitigate the aforementioned challenges. Therefore, we designed a randomized controlled trial to evaluate the efficacy and safety of a structured rehabilitation program for convalescent patients with ICIAM.

Eligible patients who are suitable for rehabilitation therapy and meet the TCM syndrome differentiation criteria of "Yangqi Deficiency with Internal Retention of Phlegm and Stasis" will be screened and undergo baseline assessments. Subsequently, they will be randomly assigned in a 1:1 ratio using block randomization to either the experimental group or the control group. The experimental group will receive a rehabilitation regimen consisting of Shengxian Quyu Decoction and specialized traditional Chinese exercise therapy, while the control group will receive conventional treatment only.The pharmacological rehabilitation intervention for the experimental group involves oral administration of Shengxian Quyu Decoction. The traditional exercise regimen is designed in accordance with the FITT principle (Frequency, Intensity, Time, Type) of exercise rehabilitation. Exercise modalities may include Baduanjin, with specific frequency, duration, and intensity tailored to individual patient conditions.The total rehabilitation period is 2 weeks. A follow-up assessment will be conducted at the end of the second week to document exercise adherence and evaluate physical examination findings, laboratory test results, TCM syndrome scores, quality of life, and Major Adverse Cardiovascular Events (MACE). Extended follow-up will continue through week 4 for MACE assessment.

Inclusion Criteria:

• ①Aged 18 to 80 years, inclusive.②Malignancy confirmed by cytology or histopathology.③Diagnosis of ICIAM following ICI therapy.④Assessed by the Multidisciplinary Team for Immune-Related Adverse Events as clinically recovered and entering the rehabilitation.⑤Meet TCM syndrome differentiation criteria for "Yangqi Deficiency with Internal Retention of Phlegm and Stasis."⑥ KPS score > 60, with a life expectancy > 6 months.

Exclusion Criteria:

• ①Diagnosis of fulminant myocarditis or cardiac function of NYHA IV.②Clear evidence suggesting cardiac injury not attributable to ICIs.③Concurrent acute cardiovascular events or malignant arrhythmias.④Coexisting severe immune-related adverse events affecting other organ systems.⑤Associated severe systemic diseases, such as severe hepatic or renal insufficiency, or severe infection.