TABLE 1

Experimental Groups of Isolated Rat Hearts

Group (n = 6)	Tracers	Perfused fatty acids	Oxygenation of perfusion medium
1	¹⁸F-FTP, ³H-palmitate	Palmitate at 0.4 mmol/L	95% (aerobic)
2	¹⁸F-FTP, ³H-palmitate	Palmitate at 0.4 mmol/L	35% (hypoxic)
3	¹⁸F-FTP, ³H-palmitate, ¹⁴C-oleate	Palmitate at 0.2 mmol/L + oleate at 0.2 mmol/L	95% (aerobic)
4	¹⁸F-FTP, ³H-palmitate, ¹⁴C-oleate	Palmitate at 0.2 mmol/L + oleate at 0.2 mmol/L	35% (hypoxic)