This gives a moving picture of the heart, with false colors corresponding to the speed of blood flow. Higher-resolution still images also are recorded, which allow precise measurements. By measuring the distance between the walls of parts of the heart, at various stages of heartbeat, the pumping efficiency can be calculated; the main such measurement is the left ventricular ejection fraction. This is especially useful for diagnosing heart failure, or a condition where the pumping efficiency is decreased. That may be treated with things including drugs, pacemakers, devices inserted through catheters, and surgery. Over the years, I’ve developing worsening congestive heart failure, effectively treated with echocardiography giving Superman-style X-ray vision, or the equivalent, to the cardiologist.About a year ago, my heart failure worsened, and was treated in a community intensive care unit. Part of the problem was that my aortic valve, through which pumped blood enters the circulation. "Umm. And what are those for? And where are they going?" I asked, looking at the clamps and then at Rochelle. She laughed."Are you going to ask me that every time I pull something out of my suitcase?" she asked, ignoring my questions and asking one of her own."I just might. I have never really done much with the whole toys thing. Well beside using a vibrator," I said blushing. Rochelle laughed as she gently took one of the clamps and put it over my nipple then did the same to the other. She gently pulled on the chair connecting them and I moaned at the feel of my nipples being pulled slightly."Now see. You like my little suitcase. Don't you, Alyssia?" Rochelle said, pulling on the chain a little harder. I lifted my pelvis up and our pussy rubbed against each other."OHHH," I moaned."Is that a yes?" Rochelle teased me. Again she pulled the nipple clamps."Yes!" I cried out. "Well are you ready for something different?" Rochelle asked me, getting up from the tub."Um okay," I said. Now why.
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