A coronary occlusion is the partial or complete obstruction of blood flow in a coronary artery. This condition may cause a heart attack.In some patients coronary occlusion causes only mild pain, tightness or vague discomfort which may be ignored; however, the myocardium, the muscle tissue of the heart, may be damaged. In history
According to Robert K. Massies Nicholas and Alexandra: The Fall of the Romanov Dynasty, Tsar Nicholas II may have suffered a coronary occlusion right before he was toppled from his throne during the Russian Revolution in 1917. See also
Arterial embolism


== References ==
Abdominal compartment syndrome (ACS) occurs when the abdomen becomes subject to increased pressure reaching past the point of intra-abdominal hypertension (IAH). ACS is present when intra-abdominal pressure rises and is sustained at > 20 mmHg and there is new organ dysfunction or failure. ACS is classified into three groups: Primary, secondary and recurrent ACS. It is not a disease and as such it occurs in conjunction with many disease processes, either due to the primary illness or in association with treatment interventions. Specific cause of abdominal compartment syndrome is not known, although some causes can be sepsis and severe abdominal trauma. Increasing pressure reduces blood flow to abdominal organs and impairs pulmonary, cardiovascular, renal, and gastro-intestinal (GI) function, causing obstructive shock, multiple organ dysfunction syndrome and death. Causes
Peritoneal tissue edema secondary to diffuse peritonitis, abdominal trauma
Fluid therapy due to massive volume resuscitation
Retroperitoneal hematoma secondary to trauma and aortic rupture
Peritoneal trauma secondary to emergency abdominal operations
Reperfusion injury following bowel ischemia due to any cause
Retroperitoneal and mesenteric inflammatory edema secondary to acute pancreatitis
Ileus and bowel obstruction
Intra-abdominal masses of any cause
Abdominal packing for control of bleeding
Closure of the abdomen under undue tension
Ascites (intra-abdominal fluid accumulation)
Acute pancreatitis with abscesses formation

Pathophysiology
Abdominal compartment syndrome occurs when tissue fluid within the peritoneal and retroperitoneal space (either edema, retroperitoneal blood or free fluid in the abdomen) accumulates in such large volumes that the abdominal wall compliance threshold is crossed and the abdomen can no longer stretch.