Carditis is the inflammation of the heart

Heart

The heart is a myogenic muscular organ found in all animals with a circulatory system , that is responsible for pumping blood throughout the blood vessels by repeated, rhythmic contractions...

 or its surroundings.

It is usually studied and treated by specifying it as:

• Pericarditis
  Pericarditis
  Pericarditis is an inflammation of the pericardium . A characteristic chest pain is often present.The causes of pericarditis are varied, including viral infections of the pericardium, idiopathic causes, uremic pericarditis, bacterial infections of the precardium Pericarditis is an inflammation of...
  
   is the inflammation of the pericardium
  Pericardium
  The pericardium is a double-walled sac that contains the heart and the roots of the great vessels.-Layers:...
  
  
• Myocarditis
  Myocarditis
  Myocarditis is inflammation of heart muscle . It resembles a heart attack but coronary arteries are not blocked.Myocarditis is most often due to infection by common viruses, such as parvovirus B19, less commonly non-viral pathogens such as Borrelia burgdorferi or Trypanosoma cruzi, or as a...
  
   is the inflammation of the heart muscle
  Heart
  The heart is a myogenic muscular organ found in all animals with a circulatory system , that is responsible for pumping blood throughout the blood vessels by repeated, rhythmic contractions...
  
  
• Endocarditis
  Endocarditis
  Endocarditis is an inflammation of the inner layer of the heart, the endocardium. It usually involves the heart valves . Other structures that may be involved include the interventricular septum, the chordae tendineae, the mural endocardium, or even on intracardiac devices...
  
    is the inflammation of the endocardium
  Endocardium
  The endocardium is the innermost layer of tissue that lines the chambers of the heart. Its cells are embryologically and biologically similar to the endothelial cells that line blood vessels....
  
  

Reflux carditis refers to a possible outcome of esophageal reflux (also known as GERD

Gastroesophageal reflux disease

Gastroesophageal reflux disease , gastro-oesophageal reflux disease , gastric reflux disease, or acid reflux disease is chronic symptoms or mucosal damage caused by stomach acid coming up from the stomach into the esophagus...

)
Pancarditis - inflammation of the entire heart (the epicardium and the myocardium and the endocardium)
carditis

Carditis

Carditis is the inflammation of the heart or its surroundings.It is usually studied and treated by specifying it as:*Pericarditis is the inflammation of the pericardium*Myocarditis is the inflammation of the heart muscle...

- inflammation of the heart