TABLE 2

Spearman Rank Correlation Coefficients for Tracer K₁ Values, Compared with Microspheres

		17 segments			3 coronary territories
Tracer	Measurement	NC	AC	ACSC	NC	AC	ACSC
²⁰¹Tl	Rest + stress K₁	0.84	0.76	0.82	0.86	0.81	0.86
	MFR*	0.82	0.79	0.83	0.79	0.82	0.84
^99mTc-tetrofosmin	Rest + stress K₁	0.70	0.70	0.67	0.68	0.70	0.65
	MFR*	0.50	0.30	0.46	0.62	0.38	0.55
^99mTc-sestamibi	Rest + stress K₁	0.67	0.71	0.72	0.51	0.56	0.68
	MFR*	0.88	0.81	0.83	0.80	0.80	0.90

All correlations are significant (P < 0.01).