Autoimmune diseases can affect almost every structure of the cardiovascular system, yet many of their cardiac manifestations remain under-recognized, under-investigated, or diagnosed late. In clinical practice, the heart may be silently injured by inflammation, immune-mediated vascular disease, myocarditis, pericarditis, valvular involvement, conduction disturbances, coronary vasculitis, pulmonary hypertension, thrombotic syndromes, or treatment-related complications. For many patients, the first cardiovascular presentation may be chest pain, breathlessness, palpitations, syncope, heart failure, arrhythmia, unexplained troponin elevation, recurrent pericardial effusion, or sudden clinical deterioration.

Rare Autoimmune Cardiac Conditions: A Comprehensive Clinical Reference is written to bring clarity to this complex and often neglected field. It is designed for cardiologists, rheumatologists, internists, immunologists, intensivists, emergency physicians, postgraduate trainees, fellows, medical students, and all clinicians involved in the diagnosis and management of patients with autoimmune and inflammatory cardiovascular disease.

This book provides a practical and clinically focused approach to rare autoimmune cardiac disorders, helping the reader recognize patterns that are easily missed in routine practice. It explores cardiac involvement in systemic lupus erythematosus, antiphospholipid syndrome, rheumatoid arthritis, systemic sclerosis, vasculitis, sarcoidosis, myocarditis syndromes, eosinophilic cardiac disease, Behçet disease, Takayasu arteritis, giant cell arteritis, inflammatory myopathies, autoimmune pericardial disease, IgG4-related disease, and other rare immune-mediated cardiovascular conditions.

The goal of this book is not only to describe diseases, but to improve diagnostic thinking. Many autoimmune cardiac disorders mimic common cardiovascular conditions. Myocarditis may resemble acute coronary syndrome. Vasculitis may present as unexplained ischemia. Pericarditis may become recurrent and resistant. Pulmonary hypertension may be mistaken for primary lung disease. Antiphospholipid syndrome may present with premature thrombosis, stroke, valve lesions, or recurrent vascular events. Cardiac sarcoidosis may first appear as conduction block, ventricular arrhythmia, or unexplained cardiomyopathy. Recognizing these warning signs early can change the course of treatment and patient survival.

Special emphasis is placed on integrating clinical presentation with ECG, echocardiography, cardiac MRI, CT angiography, PET imaging, laboratory markers, autoimmune profiles, biopsy when indicated, and multidisciplinary decision-making. The book also discusses treatment principles, including corticosteroids, immunosuppressive agents, biologic therapy, anticoagulation, heart failure therapy, antiarrhythmic strategies, device therapy, pericardial intervention, pulmonary hypertension management, and referral pathways for advanced care.

In the modern era, cardiovascular medicine cannot be separated from systemic disease. The best clinician must think beyond the coronary artery, beyond the valve, beyond the rhythm strip, and beyond the echocardiogram. A patient with autoimmune cardiac involvement needs a broader clinical lens—one that connects inflammation, immunity, thrombosis, vascular injury, myocardial dysfunction, and long-term organ protection.

This Kindle edition is structured as a useful reference for rapid reading, clinical revision, bedside decision-making, academic preparation, and multidisciplinary teaching. It helps the reader answer essential questions: When should autoimmune cardiac disease be suspected? Which tests are most useful? What conditions should be excluded first? When is urgent treatment required? When should rheumatology, cardiology, imaging, electrophysiology, or intensive care teams be involved?

Written by Dr A M Thirugnanam, Senior Interventional Cardiologist, this book reflects a practical, patient-centered, and academically strong approach to a difficult cardiovascular subject. It is intended to help clinicians detect rare but dangerous conditions earlier, manage complex patients more confidently, and build stronger collaboration between cardiology and autoimmune disease specialists.

Rare Autoimmune Cardiac Conditions is more than a reference title. It is a clinical reminder that not every cardiac disease is atherosclerotic, degenerative, or age-related. Some of the most serious heart conditions are hidden within the immune system. To recognize them is to protect the patient before irreversible damage occurs.