The treated and untreated tube pieces of at least 3 cm length (4 mm internal diameter) were connected to a heart-lung machine (Stockert III, Sorin Group, Munchen) to pass heparinized blood over that, with flow rate of 3 litres/min for 72 hrs.
It was the most sophisticated of the trackers tested, with a built in GPS receiver and the ability to connect to a heart monitor to record a wider range of activities.
In fact, smelling lavender is connected to a decreased heart rate.
Greatbatch's pacemaker was first connected to a beating heart in 1958 when his chief collaborator, William C. Chardack, then chief of surgery at Buffalo's Veterans Administration Hospital, helped attach it to a dog's heart.
The following cardiac parameters were monitored in unpaced hearts: coronary flow (as index of coronary arterial function) with a transonic flow probe, left-ventricular developed pressure via a fluid-filled balloon that was inserted into the left ventricle and connected to a pressure transducer, and heart rate, derived electronically from the pressure signal.
A bolus of each radiotracer (1 MBq in 100 μl KHB) was administered via an in-line injection port, and its transit through the perfusion apparatus was monitored by NaI detectors (1) in the arterial line above the heart cannula and (2) directly opposite the heart (to quantify the tracer accumulation in the heart) connected to a GinaSTAR TM ITLC unit (see Figure 1).
To test for accuracy, four truCCOMS catheters were tested against the reference values of a Transonic T201 flowmeter using pulsatile flow provided by a Syncardia Systems artificial heart connected to a Donovan mock circulation tank generating flows between 1 and 8 l/min.
Although hemodynamic maximization is favored, this approach is connected to a risk of fluid overload and heart failure.
"But the real difference is that these chants help each individual connect to a deeper place in their own hearts".
