Innominate artery thrombosis: Symptoms, Stroke Warning Signs, and Urgent Treatment
Innominate artery thrombosis is a sudden or progressive blockage in the first major branch off the aortic arch—the vessel that supplies blood to the...
Inoperable coronary artery disease: What It Means, Symptoms, and Management
“Inoperable coronary artery disease” is a phrase doctors use when blocked heart arteries can’t be safely or effectively fixed with procedures like stents or...
Insufficiency of aortic valve: Symptoms, Diagnosis, and When Surgery Is Needed
Aortic valve insufficiency—often called aortic regurgitation (blood leaks backward through the valve)—happens when the aortic valve does not close tightly between heartbeats. Instead of...
Insufficiency of mitral valve: Causes, Risk Factors, and How It Progresses
Mitral valve insufficiency—also called mitral regurgitation (blood leaks backward through the valve)—happens when the mitral valve doesn’t close tightly between the left atrium and...
Insufficiency of pulmonary valve: Causes, Symptoms, Diagnosis, and Treatment Options
Insufficiency of the pulmonary valve (often called pulmonary valve leakage) means the valve between the right side of the heart and the lung artery...
Insufficiency of the tricuspid valve: Risk Factors, Early Signs, and Complications
Insufficiency of the tricuspid valve—often called tricuspid regurgitation (blood leaks backward)—means the valve between the right upper and right lower chambers of the heart...
Interatrial block: Causes, Risk Factors, and Stroke Prevention Basics
Interatrial block is a heart rhythm finding that tells us the electrical signal is taking longer than usual to travel from the right upper...
Interatrial septal aneurysm: Causes, diagnosis, and treatment options
An interatrial septal aneurysm is a “floppy” area in the wall that separates the heart’s upper chambers. It usually sits where a small opening...
Interatrial septal defect: Symptoms, Diagnosis, and Modern Closure Options
An interatrial septal defect (often called an atrial septal defect, or ASD) is a gap in the wall between the heart’s two upper chambers....
Intermittent claudication: Symptoms, Diagnosis, and Proven Treatments
Intermittent claudication is a warning signal from the legs: walking brings on a tight, cramping, or aching pain—then rest makes it fade. Many people...
Intermittent complete heart block: Causes, Risk Factors, and What It Means
Intermittent complete heart block can feel like your body “cuts out” for a moment—lightheadedness, a pause in awareness, or sudden weakness that comes and...
Interrupted aortic arch: Symptoms, Emergency Signs, and Treatment
Interrupted aortic arch is a rare heart defect present at birth in which the main “highway” carrying blood from the heart to the body...
Interventricular conduction block: Bundle Branch Block Types, Symptoms, and Risks
Interventricular conduction block is a finding that tells you the heart’s electrical “wiring” is delivering the signal to the pumping chambers more slowly or...
Interventricular septal aneurysm: What It Means, Symptoms, Diagnosis, and Treatment
An interventricular septal aneurysm is a bulging “pouch” in the wall that separates the heart’s two pumping chambers. It is most often found by...
Intra-atrial reentrant tachycardia: Causes, Symptoms, Diagnosis, and Treatment Options
Intra-atrial reentrant tachycardia is a fast, repeating heartbeat pattern that starts in the upper chambers of the heart. For some people it feels like...
Intracardiac mass: Thrombus vs Tumor vs Vegetation, Symptoms, and Risks
An intracardiac mass is a broad term that simply means “something seen inside the heart” on imaging—most often on an echocardiogram (ultrasound of the...
Intracardiac shunt: Types, Symptoms, Diagnosis, and Treatment Options
An intracardiac shunt is an opening or pathway that lets blood move between the right and left sides of the heart when it normally...
Intracardiac thrombus: Causes, Symptoms, Diagnosis, and Treatment
An intracardiac thrombus is a blood clot inside the heart. It can form quietly and be found by chance, or it can cause sudden,...
Intracranial arterial dissection, Causes, Risk Factors, Warning Signs, and Management
Intracranial arterial dissection happens when a small tear forms inside an artery within the skull, allowing blood to track into the vessel wall and...
Intramural aortic hematoma, symptoms, diagnosis, and emergency treatment
An intramural aortic hematoma is a dangerous type of “bruise” inside the wall of the aorta—the body’s main artery. Instead of blood flowing only...
Intrapartum cardiomyopathy: Symptoms, Diagnosis, Emergency Care, and Recovery
Intrapartum cardiomyopathy is a rare but serious form of pregnancy-related heart weakness that shows up during labor or around delivery. It is closely related...
Intrathoracic aortic aneurysm: Causes, Size Thresholds, Imaging, and Treatment Options
An intrathoracic aortic aneurysm is a slow, often silent widening of the body’s main artery inside the chest. An aneurysm (a weakened bulge in...
Ion channelopathy: Types, Common Triggers, Symptoms, and Key Warning Signs
Ion channelopathies are conditions caused by faulty “gates” in cells that control the flow of charged particles like sodium, potassium, calcium, or chloride. When...
Ischemia: Causes, Risk Factors, Diagnosis, and Treatment Options
Ischemia happens when part of the body does not get enough blood flow to meet its needs. Without adequate blood, tissues receive less oxygen...