MALDI images of (a) PC 38a:4-HG+Ag, 733.432 Da, (b) TAG 50:2+Na, 853.726 Da, (c) TAG 50:2+Ag, 937.641 Da, (d) PC 40a:6-HG+Ag, 757.432, (e) TAG Frag 34:1+Ag, 683.410, (f) combo of 757.432 (green) and 683.410 (red), (g) SM d18:1/ 18:0-HG+Ag, 654.437 Da, (h) PE 40a:6-H+2 K, 868.466 Da, (i) combo of 654.437 (red) and 868.466 (green), (j) PC 38a:6-HG+Ag, 729.401, (k) PC 38p:4-HG+Ag, 717.438, and (l) combo of 729.401 (green) and 717.438 (red) in heart tissue section with AgNPs in positive ion mode