Does the intracoronary pressure differ according to two types (diffuse or focal) of coronary spasm?

Figure 1 The minimal distal pressure (Pd)/aortic pressure (Pa) and reduction in Pd/Pa during spasm provocation test according to the types of coronary spasm. A: Shows the minimal Pd/Pa during the spasm provocation test (SPT); B: Shows the delta Pd/Pa during the SPT in the diffuse, focal spasm, and spasm-negative vessels. In both panels, each value was lower in vessels with diffuse and focal spasms than in spasm-negative vessels (P < 0.01). Furthermore, each value was lower in vessels with focal spasms than in those with diffuse spasms (P < 0.01). Pa: Aortic pressure; Pd: Distal pressure.

Figure 2 The representative cases. A: Shows the presence of diffuse spasm in the left anterior descending coronary artery, and the minimal distal pressure (Pd)/aortic pressure (Pa) was 0.75; B: Shows the presence of a focal spasm on the right coronary artery, with a minimal Pd/Pa of 0.53. LAD: Left anterior descending coronary artery; Pa: Aortic pressure; Pd: Distal pressure; FFR: Fractional flow reserve.