RWMA has two distinct meanings depending on the context:
1. Regional Wall Motion Abnormality (Cardiology)
RWMA, in cardiology, stands for Regional Wall Motion Abnormality. It refers to an area of the heart's wall that isn't contracting normally during a heartbeat. This is often detected through echocardiography (ultrasound of the heart). While commonly associated with ischemic heart disease (heart disease caused by reduced blood flow), many other conditions can also cause RWMA. [Source: Regional wall motion abnormalities (RWMA) are usually described with Ischemic Heart Disease. But many other conditions also show RWMA. (Google Search Result Snippet)]
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Examples of conditions causing RWMA: The provided references don't give an exhaustive list, but highlight that ischemic heart disease is just one cause, and that other medical issues can lead to irregular contractions in a specific area of the heart. [Source: Google Search Result Snippet] Studies utilize echocardiographic RWMA to detect coronary artery disease (CAD). [Source: To evaluate the usefulness of echocardiographic regional wall motion abnormalities (RWMA) in detecting coronary artery disease (CAD) in patients with left... (PubMed Snippet)] There is also a potential link between cerebral embolic risk and RWMA. [Source: Although regional wall motion abnormality (RWMA) of the left ventricle (LV) seems to be related to CE stroke, association between cerebral embolic risk and RWMA...(ScienceDirect Snippet)]
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Significance: Detecting RWMA is crucial for diagnosing and managing various heart conditions. A "No RWMA" finding on an echocardiogram typically suggests normal heart wall movement. [Source: Quora Snippet] RWMA in a 2D echo indicates that a part of the heart's left chamber isn't contracting properly. [Source: Regional wall motion abnormalities is shortly called as RWMA. It means a part of left side chamber of the heart is not contracting as it normally should. (Heart Specialist Hyderabad Snippet)]
2. Resistance Welding Manufacturing Alliance (Manufacturing)
RWMA also stands for the Resistance Welding Manufacturing Alliance, a group under the American Welding Society (AWS). This RWMA focuses on resistance welding, a process that joins materials using heat generated by electrical resistance. Within this context, RWMA classes refer to different types of materials used in resistance welding electrodes, each with specific properties and applications.
- RWMA Classes: These classes categorize materials based on their composition and suitability for different welding tasks. For example, Class 20 material is commonly used for spot welding galvanized steel. [Source: Why is RWMA Class 20 used to spot weld galvanized steel? A common use for RWMA Class 20 material is spot welding of galvanized steel...(How to Resistance Weld Snippet)] Class 14 (100% molybdenum) is used for resistance welding or resistance brazing of braided materials. [Source: The refractory metal face is RWMA Class 14 (100% molybdenum)(ASTM B387 Type 360) which is typically used for resistance welding or resistance brazing braided or...(Tuffaloy Snippet)] A table describing various RWMA classes and applications can be found here: Tuffaloy RWMA Materials
