Which description of stool is characteristic of intussusception?

The correct answer is choice B. Cardiac valve damage.

Choice A rationale:

Pulmonary hypertension is not a common complication of rheumatic fever. Rheumatic fever primarily affects the heart, joints, skin, and brain, and pulmonary hypertension is not a typical manifestation of this condition.

Choice B rationale:

Cardiac valve damage is a common and serious complication of rheumatic fever. Rheumatic fever is caused by an autoimmune reaction to untreated streptococcal infections, particularly Streptococcus pyogenes. The immune response targets not only the streptococcal bacteria but also the body's own tissues, especially heart valves. This can lead to inflammation of the heart valves, a condition known as rheumatic heart disease. Over time, repeated bouts of rheumatic fever can result in significant damage to the heart valves, leading to valve insufficiency or stenosis. This can ultimately cause heart failure and other cardiovascular complications.

Choice C rationale:

Seizures are not a common complication of rheumatic fever. Rheumatic fever primarily affects the heart and other body systems, but it does not typically lead to seizures.

Choice D rationale:

Cardiac arrhythmias are possible complications of rheumatic fever, but they are not as common or significant as cardiac valve damage. The inflammation and scarring caused by rheumatic fever can disrupt the electrical pathways of the heart, potentially leading to arrhythmias. However, the more prevalent and severe consequence of rheumatic fever is the damage to the heart valves.

The correct answer is choice A: Anaphylactic shock.

Choice A rationale:

Anaphylactic shock is the correct answer. Anaphylactic shock is a severe and potentially life-threatening allergic reaction that causes massive vasodilation, capillary leakage, and bronchoconstriction. It can occur rapidly after exposure to an allergen such as certain foods, insect stings, medications, or latex. The release of histamine and other inflammatory mediators leads to systemic vasodilation and increased permeability of blood vessels, resulting in a sudden drop in blood pressure and compromised organ perfusion.

Choice B rationale:

Cardiogenic shock is characterized by inadequate cardiac output due to severe heart dysfunction. It is typically caused by conditions like myocardial infarction, heart failure, or other cardiac issues. While allergic reactions can potentially affect the cardiovascular system, the symptoms described in the question are more indicative of anaphylactic shock.

Choice C rationale:

Neurogenic shock results from disruption of sympathetic nervous system control over blood vessel tone, often due to spinal cord injury or severe emotional distress. This leads to widespread vasodilation and a sudden drop in blood pressure. While it can cause hemodynamic instability, it doesn't specifically involve the hypersensitivity reaction and capillary leaks associated with anaphylactic shock.

Choice D rationale:

Hypovolemic shock is caused by a significant loss of blood volume or bodily fluids, leading to decreased intravascular volume and subsequent inadequate tissue perfusion. This shock type is not directly related to a hypersensitivity reaction or capillary leakage caused by allergic responses. 2 / 2