**Core Concept**
Rheumatic heart disease (RHD) is a complication of rheumatic fever, characterized by inflammation and scarring of the heart valves. The major criteria for diagnosing RHD involve clinical manifestations, laboratory findings, and echocardiographic evidence.

**Why the Correct Answer is Right**
The major criteria for RHD include carditis (inflammation of the heart), arthritis (joint inflammation), chorea (a neurological disorder), erythema marginatum (a skin rash), and subcutaneous nodules. These criteria are used to diagnose acute rheumatic fever, which can progress to RHD if left untreated. The major criteria are essential for diagnosing RHD, and any deviation from these criteria would indicate a different condition.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify which criterion is not included in the major criteria for RHD. The correct answer will be revealed later.
* **Option B:** This option is incorrect because it implies that the major criteria for RHD include additional conditions not typically associated with the disease. The major criteria are well-established and widely accepted.
* **Option C:** This option is incorrect because it suggests that the major criteria for RHD are not well-defined or are subject to change. The major criteria have been consistently used in the diagnosis of RHD.

**Clinical Pearl / High-Yield Fact**
The Jones criteria, developed in 1944, are still widely used to diagnose acute rheumatic fever and its potential progression to RHD. These criteria include both major and minor criteria, which help clinicians diagnose the condition accurately.

**Correct Answer: D.**