Which condition is indicated by a "lobster claw" in the continuous wave Doppler signal?

The "lobster claw" appearance in a continuous wave Doppler signal is characteristic of apical cardiomyopathy. This phenomenon occurs due to the altered flow dynamics and impaired ventricular function associated with this condition, leading to distinct patterns seen on Doppler imaging.

Apical cardiomyopathy is characterized by abnormal contractions in the apex of the heart, often resulting in a specific pattern of blood flow. The "lobster claw" appearance signifies changes in the velocity profile and reflects how blood is ejected from the left ventricle, especially when the apex is involved. The shape illustrates the variations in flow that indicate potential obstruction or unique ejection patterns.

This distinction is crucial for diagnosing apical cardiomyopathy, as recognizing this specific Doppler signal can direct further evaluation and management of the patient's condition.