Fluttering cycle

Even though the valve may be stable during a relief cycle, the bellows itself can still flutter during a relief cycle due to the high turbulence in the body bowl or vibration due to compressors or pumps in the system. This rapid flexing of the bellows convolutions will result in cold working of the bellows material and welds (Figure 10.11). 

Guo GB, et al. Conversion of atrial flutter by ibutilide is associated with increased atrial cycle length variability. J Am Coll Cardiol I 996 27(5) 1083-1089. 

Rose-colored glasses may indeed make the world look rosier, whereas battery-powered wrist watches may have some unexpected and adverse effects, for example, on the wearer s memory, not to mention fluorescent lighting and its cyclic intensity that is, its fluttering with 60-cycle alternating current. For more on this offbeat subject, there is the work of John Ott about the physiological effects of light and radiation.)... 

Fig. 12.2 An example of atrial fibrillation (AF) organizing into atrial flutter. A. The upper strip in the top panel demonstrates the atrial electrogram (EGM) and the lower strip demonstrates the annotated markers indicating how the pacemaker classifies each atrial and ventricular event as well as the cycle length (in ms) between each interval. The atrial electrogram shows the rapid irregular atrial rhythm which subsequently transitions into an organized atrial tachycardia. B. Atrial antitachycardia pacing (ATP) therapy - a burst train followed by two premature extrastimuli is delivered restoring atrial paced rhythm. The marker channel notations indicate how the device classifies each beat. Inter-beat intervals are also shown (in ms). AP - atrial paced event VP - ventricular paced event AR - atrial event sensed in atrial refractory period FS - AF sensed event TD - tachycardia detected TS - tachycardia sensed event. Courtesy AM Gillis.

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