[2025-09-29T19:36:30.545866] [QUERYOME] Starting research for query 220: 'Instructions: 
 Answer the question below. First, respond with the single best option letter (A, B, C, or D). Then provide a concise reasoning (1–3 sentences). Use both the retrieved evidence and your own medical knowledge to choose the most accurate answer. 

Question:
Major mechanism of action of nitrates in acute attack of angina is:- 

Options:
{'A': 'Coronary vasodilation', 'B': 'Decreases in preload', 'C': 'Decreases in afterload', 'D': 'Decreases in hea rate'}'
[2025-09-29T19:36:30.613646] [PI] Starting research for query: 'Instructions: 
 Answer the question below. First, respond with the single best option letter (A, B, C, or D). Then provide a concise reasoning (1–3 sentences). Use both the retrieved evidence and your own medical knowledge to choose the most accurate answer. 

Question:
Major mechanism of action of nitrates in acute attack of angina is:- 

Options:
{'A': 'Coronary vasodilation', 'B': 'Decreases in preload', 'C': 'Decreases in afterload', 'D': 'Decreases in hea rate'}'
[2025-09-29T19:36:30.615148] Saving text to bench_final/run1/medmcqa/medmcqa_219/pi_initial_prompt.txt
[2025-09-29T19:36:30.620505] [PI] Calling o3 for initial analysis...
[2025-09-29T19:36:36.639262] [PI] Reasoning iteration 1
[2025-09-29T19:36:36.643118] [PI reasoning] **Evaluating nitrates in angina**

I need to tackle a multiple-choice question about nitrates and their action during an acute angina attack. Nitrates, like nitroglycerin, mainly work by causing venodilation, which decreases preload and subsequently reduces myocardial oxygen demand. While they can cause coronary vasodilation, it’s not the primary mechanism for stable angina relief. So, I lean toward the answer being a decrease in preload, which is letter B. I should look for minimal evidence to back this up using a quick search!
[2025-09-29T19:36:36.645752] [PI] Executing function call 1: hybrid_search
[2025-09-29T19:36:36.649867] [PI] Function arguments: {'query': 'nitrates decrease preload venodilation primary mechanism angina relief', 'k': 5, 'faiss_weight': 0.6, 'bm25_weight': 0.4, 'use_rrf': True}
[2025-09-29T19:36:36.653897] Saving JSON to bench_final/run1/medmcqa/medmcqa_219/pi_iteration_1_tool_call_2_hybrid_search.json
[2025-09-29T19:37:23.739475] [PI] Function hybrid_search executed successfully
[2025-09-29T19:37:23.742613] Saving JSON to bench_final/run1/medmcqa/medmcqa_219/pi_iteration_1_tool_result_2_hybrid_search.json
[2025-09-29T19:37:23.755600] [PI] Continuing reasoning with 1 function responses...
[2025-09-29T19:37:28.755856] [PI] Reasoning iteration 2
[2025-09-29T19:37:28.758349] [PI] No function calls found in response
[2025-09-29T19:37:28.760007] [PI] No more function calls - research complete
[2025-09-29T19:37:28.762367] Saving text to bench_final/run1/medmcqa/medmcqa_219/pi_final_answer.txt
[2025-09-29T19:37:28.766064] [QUERYOME] Query completed successfully
