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Figure 3: The snare is seen tightly gripping the screw of the right atrial disk. Once the cable is unscrewed, an unstable device slips out of the deficient margin as shown by significant displacement of the device on the fluoroscopic image [Movie 4]

Figure 3: The snare is seen tightly gripping the screw of the right atrial disk. Once the cable is unscrewed, an unstable device slips out of the deficient margin as shown by significant displacement of the device on the fluoroscopic image [Movie 4]